C# Winform WPF DeskBand 窗体嵌入任务栏，在任务栏显示文字

更新日期：2020年4月23日，更新内容：更新ComImport、DeskBand，解决电脑重启以及explorer.exe重启后，勾选状态没有保存的问题

最近写了个小程序，用于将固态硬盘的写入量等信息显示在任务栏，最开始使用Windows API也可以实现，但是当任务栏托盘增加的时候，会被遮盖，最终采用了DeskBand来实现，填了很多坑。

参考的GitHub地址：https://github.com/dsafa/CSDeskBand

DeskBand相关代码如下：

COLORREF：

// This code snippet was used by SharpShell.
//

using System.Drawing;
using System.Runtime.InteropServices;

namespace MyDiskInfo.Interop
{
    [StructLayout(LayoutKind.Sequential)]
    public struct COLORREF
    {
        public COLORREF(Color color)
        {
            Dword = (uint)color.R + (((uint)color.G) << ) + (((uint)color.B) << );
        }

        public uint Dword;
        public Color Color
        {
            get
            {
                return Color.FromArgb(
                    (int)(0x000000FFU & Dword),
                    (int)(0x0000FF00U & Dword) >> ,
                    (int)(0x00FF0000U & Dword) >> );
            }
        }
    }
}

DESKBANDINFO：

using System;
using System.Runtime.InteropServices;

namespace MyDiskInfo.Interop
{
    /// <summary>
    /// Receives information about a band object. This structure is used with the deprecated IDeskBand::GetBandInfo method.
    /// </summary>
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct DESKBANDINFO
    {
        /// <summary>
        /// Set of flags that determine which members of this structure are being requested.
        /// </summary>
        /// <remarks>
        /// This will be a combination of the following values:
        ///     DBIM_MINSIZE    ptMinSize is being requested.
        ///     DBIM_MAXSIZE    ptMaxSize is being requested.
        ///     DBIM_INTEGRAL   ptIntegral is being requested.
        ///     DBIM_ACTUAL     ptActual is being requested.
        ///     DBIM_TITLE      wszTitle is being requested.
        ///     DBIM_MODEFLAGS  dwModeFlags is being requested.
        ///     DBIM_BKCOLOR    crBkgnd is being requested.
        /// </remarks>
        public DBIM dwMask;

        /// <summary>
        /// Point structure that receives the minimum size of the band object.
        /// The minimum width is placed in the x member and the minimum height
        /// is placed in the y member.
        /// </summary>
        public POINT ptMinSize;

        /// <summary>
        /// Point structure that receives the maximum size of the band object.
        /// The maximum height is placed in the y member and the x member is ignored.
        /// If there is no limit for the maximum height, (LONG)-1 should be used.
        /// </summary>
        public POINT ptMaxSize;

        /// <summary>
        /// Point structure that receives the sizing step value of the band object.
        /// The vertical step value is placed in the y member, and the x member is ignored.
        /// The step value determines in what increments the band will be resized.
        /// </summary>
        /// <remarks>
        /// This member is ignored if dwModeFlags does not contain DBIMF_VARIABLEHEIGHT.
        /// </remarks>
        public POINT ptIntegral;

        /// <summary>
        /// Point structure that receives the ideal size of the band object.
        /// The ideal width is placed in the x member and the ideal height is placed in the y member.
        /// The band container will attempt to use these values, but the band is not guaranteed to be this size.
        /// </summary>
        public POINT ptActual;

        /// <summary>
        /// The title of the band.
        /// </summary>
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = )]
        public String wszTitle;

        /// <summary>
        /// A value that receives a set of flags that define the mode of operation for the band object.
        /// </summary>
        /// <remarks>
        /// This must be one or a combination of the following values.
        ///     DBIMF_NORMAL
        ///     The band is normal in all respects. The other mode flags modify this flag.
        ///     DBIMF_VARIABLEHEIGHT
        ///     The height of the band object can be changed. The ptIntegral member defines the
        ///     step value by which the band object can be resized.
        ///     DBIMF_DEBOSSED
        ///     The band object is displayed with a sunken appearance.
        ///     DBIMF_BKCOLOR
        ///     The band will be displayed with the background color specified in crBkgnd.
        /// </remarks>
        public DBIMF dwModeFlags;

        /// <summary>
        /// The background color of the band.
        /// </summary>
        /// <remarks>
        /// This member is ignored if dwModeFlags does not contain the DBIMF_BKCOLOR flag.
        /// </remarks>
        public COLORREF crBkgnd;

        /// <summary>
        /// The view mode of the band object. This is one of the following values.
        /// </summary>
        [Flags]
        public enum DBIF
        {
            /// <summary>
            /// Band object is displayed in a horizontal band.
            /// </summary>
            DBIF_VIEWMODE_NORMAL = 0x0000,

            /// <summary>
            /// Band object is displayed in a vertical band.
            /// </summary>
            DBIF_VIEWMODE_VERTICAL = 0x0001,

            /// <summary>
            /// Band object is displayed in a floating band.
            /// </summary>
            DBIF_VIEWMODE_FLOATING = 0x0002,

            /// <summary>
            /// Band object is displayed in a transparent band.
            /// </summary>
            DBIF_VIEWMODE_TRANSPARENT = 0x0004
        }

        /// <summary>
        /// The set of flags that determine which members of this structure are being requested by the caller. One or more of the following values:
        /// </summary>
        [Flags]
        public enum DBIM
        {
            /// <summary>
            /// ptMinSize is requested.
            /// </summary>
            DBIM_MINSIZE = 0x0001,

            /// <summary>
            /// ptMaxSize is requested.
            /// </summary>
            DBIM_MAXSIZE = 0x0002,

            /// <summary>
            /// ptIntegral is requested.
            /// </summary>
            DBIM_INTEGRAL = 0x0004,

            /// <summary>
            /// ptActual is requested.
            /// </summary>
            DBIM_ACTUAL = 0x0008,

            /// <summary>
            /// wszTitle is requested.
            /// </summary>
            DBIM_TITLE = 0x0010,

            /// <summary>
            /// dwModeFlags is requested.
            /// </summary>
            DBIM_MODEFLAGS = 0x0020,

            /// <summary>
            /// crBkgnd is requested.
            /// </summary>
            DBIM_BKCOLOR = 0x0040
        }

        /// <summary>
        /// A value that receives a set of flags that specify the mode of operation for the band object. One or more of the following values:
        /// </summary>
        [Flags]
        public enum DBIMF : uint
        {
            /// <summary>
            /// The band uses default properties. The other mode flags modify this flag.
            /// </summary>
            DBIMF_NORMAL = 0x0000,

            /// <summary>
            /// Windows XP and later: The band object is of a fixed sized and position. With this flag, a sizing grip is not displayed on the band object.
            /// </summary>
            DBIMF_FIXED = 0x0001,

            /// <summary>
            /// DBIMF_FIXEDBMP
            /// Windows XP and later: The band object uses a fixed bitmap (.bmp) file as its background. Note that backgrounds are not supported in all cases, so the bitmap may not be seen even when this flag is set.
            /// </summary>
            DBIMF_FIXEDBMP = 0x0004,

            /// <summary>
            /// The height of the band object can be changed. The ptIntegral member defines the step value by which the band object can be resized.
            /// </summary>
            DBIMF_VARIABLEHEIGHT = 0x0008,

            /// <summary>
            /// Windows XP and later: The band object cannot be removed from the band container.
            /// </summary>
            DBIMF_UNDELETEABLE = 0x0010,

            /// <summary>
            /// The band object is displayed with a sunken appearance.
            /// </summary>
            DBIMF_DEBOSSED = 0x0020,

            /// <summary>
            /// The band is displayed with the background color specified in crBkgnd.
            /// </summary>
            DBIMF_BKCOLOR = 0x0040,

            /// <summary>
            /// Windows XP and later: If the full band object cannot be displayed (that is, the band object is smaller than ptActual, a chevron is shown to indicate that there are more options available. These options are displayed when the chevron is clicked.
            /// </summary>
            DBIMF_USECHEVRON = 0x0080,

            /// <summary>
            /// Windows XP and later: The band object is displayed in a new row in the band container.
            /// </summary>
            DBIMF_BREAK = 0x0100,

            /// <summary>
            /// Windows XP and later: The band object is the first object in the band container.
            /// </summary>
            DBIMF_ADDTOFRONT = 0x0200,

            /// <summary>
            /// Windows XP and later: The band object is displayed in the top row of the band container.
            /// </summary>
            DBIMF_TOPALIGN = 0x0400,

            /// <summary>
            /// Windows Vista and later: No sizing grip is ever displayed to allow the user to move or resize the band object.
            /// </summary>
            DBIMF_NOGRIPPER = 0x0800,

            /// <summary>
            /// Windows Vista and later: A sizing grip that allows the user to move or resize the band object is always shown, even if that band object is the only one in the container.
            /// </summary>
            DBIMF_ALWAYSGRIPPER = 0x1000,

            /// <summary>
            /// Windows Vista and later: The band object should not display margins.
            /// </summary>
            DBIMF_NOMARGINS = 0x2000
        }
    }
}

POINT：

// This code snippet was used by SharpShell.
//
using System.Runtime.InteropServices;

namespace MyDiskInfo.Interop
{
    /// <summary>
    /// The POINT structure defines the x- and y- coordinates of a point.
    /// </summary>
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct POINT
    {
        /// <summary>
        /// The x-coordinate of the point.
        /// </summary>
        public int X;

        /// <summary>
        /// The y-coordinate of the point.
        /// </summary>
        public int Y;
    }
}

RECT：

using System.Runtime.InteropServices;

namespace MyDiskInfo.Interop
{
    [StructLayout(LayoutKind.Sequential)]
    public struct RECT
    {
        public RECT(int left, int top, int right, int bottom)
        {
            this.left = left;
            this.top = top;
            this.right = right;
            this.bottom = bottom;
        }

        public int left, top, right, bottom;

        public int Width()
        {
            return right - left;
        }

        public int Height()
        {
            return bottom - top;
        }

        public void Offset(int x, int y)
        {
            left += x;
            right += x;
            top += y;
            bottom += y;
        }

        public void Set(int left, int top, int right, int bottom)
        {
            this.left = left;
            this.top = top;
            this.right = right;
            this.bottom = bottom;
        }

        public bool IsEmpty()
        {
            return Width() ==  && Height() == ;
        }
    }
}

Attributes：

using System;
using System.Runtime.InteropServices;

namespace MyDiskInfo
{
    /// <summary>
    /// The display name of the extension and the description for the HelpText(displayed in status bar when menu command selected).
    /// </summary>
    [AttributeUsage(AttributeTargets.Class)]
    public class DeskBandInfoAttribute : System.Attribute
    {
        private string _displayName;
        private string _helpText;

        public string DisplayName
        {
            get { return _displayName; }
        }

        public string HelpText
        {
            get { return _helpText; }
        }

        public DeskBandInfoAttribute() { }

        public DeskBandInfoAttribute(string displayName, string helpText)
        {
            _displayName = displayName;
            _helpText = helpText;
        }
    }
}

WinError：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyDiskInfo.Interop
{
    public static class WinError
    {
        public const int S_OK = 0x0000;
        public const int S_FALSE = 0x0001;
        public const int E_FAIL = -;
        public const int E_INVALIDARG = -;
        public const int E_OUTOFMEMORY = -;
        public const int E_UNEXPECTED = unchecked((int)0x8000FFFF);
        public const int E_NOTIMPL = unchecked((int)0x80004001);
        public const int E_NOINTERFACE = unchecked((int)0x80004002);
        public const int STRSAFE_E_INSUFFICIENT_BUFFER = -;

        public const uint SEVERITY_SUCCESS = ;
        public const uint SEVERITY_ERROR = ;

        /// <summary>
        /// Create an HRESULT value from component pieces.
        /// </summary>
        /// <param name="sev">The severity to be used</param>
        /// <param name="fac">The facility to be used</param>
        /// <param name="code">The error number</param>
        /// <returns>A HRESULT constructed from the above 3 values</returns>
        public static int MAKE_HRESULT(uint sev, uint fac, uint code)
        {
            return (int)((sev << ) | (fac << ) | code);
        }
    }
}

ComImport：

using System;
using System.Runtime.InteropServices;
using System.Security;
using System.Windows.Interop;

namespace MyDiskInfo.Interop
{
    /// <summary>
    /// Provides a simple way to support communication between an object and its site in the container.
    /// </summary>
    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("FC4801A3-2BA9-11CF-A229-00AA003D7352")]
    public interface IObjectWithSite
    {
        /// <summary>
        /// Enables a container to pass an object a pointer to the interface for its site.
        /// </summary>
        /// <param name="pUnkSite">A pointer to the IUnknown interface pointer of the site managing this object.
        /// If NULL, the object should call Release on any existing site at which point the object no longer knows its site.</param>
        [PreserveSig]
        int SetSite([MarshalAs(UnmanagedType.IUnknown)] object pUnkSite);

        /// <summary>
        /// Retrieves the latest site passed using SetSite.
        /// </summary>
        /// <param name="riid">The IID of the interface pointer that should be returned in ppvSite.</param>
        /// <param name="ppvSite">Address of pointer variable that receives the interface pointer requested in riid.</param>
        [PreserveSig]
        int GetSite(ref Guid riid, [MarshalAs(UnmanagedType.IUnknown)] out IntPtr ppvSite);
    }

    /// <summary>
    /// Exposes a method that is used to communicate focus changes for a user input object contained in the Shell.
    /// </summary>
    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("F1DB8392-7331-11D0-8C99-00A0C92DBFE8")]
    public interface IInputObjectSite
    {
        /// <summary>
        /// Informs the browser that the focus has changed.
        /// </summary>
        /// <param name="punkObj">The address of the IUnknown interface of the object gaining or losing the focus.</param>
        /// <param name="fSetFocus">Indicates if the object has gained or lost the focus. If this value is nonzero, the object has gained the focus.
        /// If this value is zero, the object has lost the focus.</param>
        /// <returns>Returns S_OK if the method was successful, or a COM-defined error code otherwise.</returns>
        [PreserveSig]
        Int32 OnFocusChangeIS([MarshalAs(UnmanagedType.IUnknown)] Object punkObj, Int32 fSetFocus);
    }

    /// <summary>
    /// The IOleWindow interface provides methods that allow an application to obtain the handle to the various windows that participate in in-place activation, and also to enter and exit context-sensitive help mode.
    /// </summary>
    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("00000114-0000-0000-C000-000000000046")]
    public interface IOleWindow
    {
        /// <summary>
        /// Retrieves a handle to one of the windows participating in in-place activation (frame, document, parent, or in-place object window).
        /// </summary>
        /// <param name="phwnd">A pointer to a variable that receives the window handle.</param>
        /// <returns>This method returns S_OK on success.</returns>
        [PreserveSig]
        int GetWindow(out IntPtr phwnd);

        /// <summary>
        /// Determines whether context-sensitive help mode should be entered during an in-place activation session.
        /// </summary>
        /// <param name="fEnterMode">TRUE if help mode should be entered; FALSE if it should be exited.</param>
        /// <returns>This method returns S_OK if the help mode was entered or exited successfully, depending on the value passed in fEnterMode.</returns>
        [PreserveSig]
        int ContextSensitiveHelp(bool fEnterMode);
    }

    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("012DD920-7B26-11D0-8CA9-00A0C92DBFE8")]
    public interface IDockingWindow : IOleWindow
    {
        #region IOleWindow

        [PreserveSig]
        new int GetWindow(out IntPtr phwnd);

        [PreserveSig]
        new int ContextSensitiveHelp(bool fEnterMode);

        #endregion

        /// <summary>
        /// Instructs the docking window object to show or hide itself.
        /// </summary>
        /// <param name="fShow">TRUE if the docking window object should show its window.
        /// FALSE if the docking window object should hide its window and return its border space by calling SetBorderSpaceDW with zero values.</param>
        /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns>
        [PreserveSig]
        int ShowDW([In] bool fShow);

        /// <summary>
        /// Notifies the docking window object that it is about to be removed from the frame.
        /// The docking window object should save any persistent information at this time.
        /// </summary>
        /// <param name="dwReserved">Reserved. This parameter should always be zero.</param>
        /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns>
        [PreserveSig]
        int CloseDW([In] UInt32 dwReserved);

        /// <summary>
        /// Notifies the docking window object that the frame's border space has changed.
        /// </summary>
        /// <param name="prcBorder">Pointer to a RECT structure that contains the frame's available border space.</param>
        /// <param name="punkToolbarSite">Pointer to the site's IUnknown interface. The docking window object should call the QueryInterface method for this interface, requesting IID_IDockingWindowSite.
        /// The docking window object then uses that interface to negotiate its border space. It is the docking window object's responsibility to release this interface when it is no longer needed.</param>
        /// <param name="fReserved">Reserved. This parameter should always be zero.</param>
        /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns>
        [PreserveSig]
        int ResizeBorderDW(RECT prcBorder, [In, MarshalAs(UnmanagedType.IUnknown)] IntPtr punkToolbarSite, bool fReserved);
    }

    /// <summary>
    /// Gets information about a band object.
    /// </summary>
    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("EB0FE172-1A3A-11D0-89B3-00A0C90A90AC")]
    public interface IDeskBand : IDockingWindow
    {
        #region IOleWindow

        [PreserveSig]
        new int GetWindow(out IntPtr phwnd);

        [PreserveSig]
        new int ContextSensitiveHelp(bool fEnterMode);

        #endregion

        #region IDockingWindow

        [PreserveSig]
        new int ShowDW([In] bool fShow);

        [PreserveSig]
        new int CloseDW([In] UInt32 dwReserved);

        [PreserveSig]
        new int ResizeBorderDW(RECT prcBorder, [In, MarshalAs(UnmanagedType.IUnknown)] IntPtr punkToolbarSite, bool fReserved);

        #endregion

        /// <summary>
        /// Gets state information for a band object.
        /// </summary>
        /// <param name="dwBandID">The identifier of the band, assigned by the container. The band object can retain this value if it is required.</param>
        /// <param name="dwViewMode">The view mode of the band object. One of the following values: DBIF_VIEWMODE_NORMAL, DBIF_VIEWMODE_VERTICAL, DBIF_VIEWMODE_FLOATING, DBIF_VIEWMODE_TRANSPARENT.</param>
        /// <param name="pdbi">Pointer to a DESKBANDINFO structure that receives the band information for the object. The dwMask member of this structure indicates the specific information that is being requested.</param>
        /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns>
        [PreserveSig]
        int GetBandInfo(UInt32 dwBandID, DESKBANDINFO.DBIF dwViewMode, ref DESKBANDINFO pdbi);
    }

    /// <summary>
    /// Exposes methods to enable and query translucency effects in a deskband object.
    /// </summary>
    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("79D16DE4-ABEE-4021-8D9D-9169B261D657")]
    public interface IDeskBand2 : IDeskBand
    {
        #region IOleWindow

        [PreserveSig]
        new int GetWindow(out IntPtr phwnd);

        [PreserveSig]
        new int ContextSensitiveHelp(bool fEnterMode);

        #endregion

        #region IDockingWindow

        [PreserveSig]
        new int ShowDW([In] bool fShow);

        [PreserveSig]
        new int CloseDW([In] UInt32 dwReserved);

        [PreserveSig]
        new int ResizeBorderDW(RECT prcBorder, [In, MarshalAs(UnmanagedType.IUnknown)] IntPtr punkToolbarSite, bool fReserved);

        #endregion

        #region IDeskBand

        [PreserveSig]
        new int GetBandInfo(UInt32 dwBandID, DESKBANDINFO.DBIF dwViewMode, ref DESKBANDINFO pdbi);

        #endregion

        /// <summary>
        /// Indicates the deskband's ability to be displayed as translucent.
        /// </summary>
        /// <param name="pfCanRenderComposited">When this method returns, contains a BOOL indicating ability.</param>
        /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns>
        [PreserveSig]
        int CanRenderComposited(out bool pfCanRenderComposited);

        /// <summary>
        /// Sets the composition state.
        /// </summary>
        /// <param name="fCompositionEnabled">TRUE to enable the composition state; otherwise, FALSE.</param>
        /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns>
        [PreserveSig]
        int SetCompositionState(bool fCompositionEnabled);

        /// <summary>
        /// Gets the composition state.
        /// </summary>
        /// <param name="pfCompositionEnabled">When this method returns, contains a BOOL that indicates state.</param>
        /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns>
        [PreserveSig]
        int GetCompositionState(out bool pfCompositionEnabled);
    }

    /// <summary>
    /// Enables the saving and loading of objects that use a simple serial stream for their storage needs.
    /// </summary>
    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("00000109-0000-0000-C000-000000000046")]
    public interface IPersistStream : IPersist
    {
        #region IPersist Overrides

        /// <summary>
        /// Retrieves the class identifier (CLSID) of the object.
        /// </summary>
        /// <param name="pClassID">A pointer to the location that receives the CLSID on return.
        /// The CLSID is a globally unique identifier (GUID) that uniquely represents an object class that defines the code that can manipulate the object's data.</param>
        /// <returns>
        /// If the method succeeds, the return value is S_OK. Otherwise, it is E_FAIL.
        /// </returns>
        [PreserveSig]
        new int GetClassID(out Guid pClassID);

        #endregion

        /// <summary>
        /// Determines whether this instance is dirty.
        /// </summary>
        /// <returns></returns>
        [PreserveSig]
        int IsDirty();

        /// <summary>
        /// Initializes an object from the stream where it was saved previously.
        /// </summary>
        /// <param name="pStm">An IStream pointer to the stream from which the object should be loaded.</param>
        /// <returns>This method can return the following values. S_OK, E_OUTOFMEMORY, E_FAIL.</returns>
        [PreserveSig]
        int Load([In, MarshalAs(UnmanagedType.Interface)] object pStm);

        /// <summary>
        /// Saves an object to the specified stream.
        /// </summary>
        /// <param name="pStm">An IStream pointer to the stream into which the object should be saved.</param>
        /// <param name="fClearDirty">Indicates whether to clear the dirty flag after the save is complete. If TRUE, the flag should be cleared. If FALSE, the flag should be left unchanged.</param>
        /// <returns>This method can return the following values. S_OK, STG_E_CANTSAVE, STG_E_MEDIUMFULL.</returns>
        [PreserveSig]
        int Save([In, MarshalAs(UnmanagedType.Interface)] IntPtr pStm, bool fClearDirty);

        /// <summary>
        /// Retrieves the size of the stream needed to save the object.
        /// </summary>
        /// <param name="pcbSize">The size in bytes of the stream needed to save this object, in bytes.</param>
        /// <returns>This method returns S_OK to indicate that the size was retrieved successfully.</returns>
        [PreserveSig]
        int GetSizeMax(out ulong pcbSize);
    }

    /// <summary>
    /// Provides the CLSID of an object that can be stored persistently in the system.
    /// Allows the object to specify which object handler to use in the client process, as it is used in the default implementation of marshaling.
    /// </summary>
    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("0000010c-0000-0000-c000-000000000046")]
    public interface IPersist
    {
        /// <summary>
        /// Retrieves the class identifier (CLSID) of the object.
        /// </summary>
        /// <param name="pClassID">A pointer to the location that receives the CLSID on return.
        /// The CLSID is a globally unique identifier (GUID) that uniquely represents an object class that defines the code that can manipulate the object's data.</param>
        /// <returns>If the method succeeds, the return value is S_OK. Otherwise, it is E_FAIL.</returns>
        [PreserveSig]
        int GetClassID(out Guid pClassID);
    }

    /// <summary>
    /// Exposes methods that change UI activation and process accelerators for a user input object contained in the Shell.
    /// </summary>
    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("68284faa-6a48-11d0-8c78-00c04fd918b4")]
    [SuppressUnmanagedCodeSecurity]
    public interface IInputObject
    {
        /// <summary>
        /// UI-activates or deactivates the object.
        /// </summary>
        /// <param name="fActivate">Indicates if the object is being activated or deactivated. If this value is nonzero, the object is being activated. If this value is zero, the object is being deactivated.</param>
        /// <param name="msg">A pointer to an MSG structure that contains the message that caused the activation change. This value may be NULL.</param>
        /// <returns>If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns>
        [PreserveSig]
        int UIActivateIO(bool fActivate, ref MSG msg);

        /// <summary>
        /// Determines if one of the object's windows has the keyboard focus.
        /// </summary>
        /// <returns>Returns S_OK if one of the object's windows has the keyboard focus, or S_FALSE otherwise.</returns>
        [PreserveSig]
        int HasFocusIO();

        /// <summary>
        /// Enables the object to process keyboard accelerators.
        /// </summary>
        /// <param name="msg">The address of an MSG structure that contains the keyboard message that is being translated.</param>
        /// <returns>Returns S_OK if the accelerator was translated, or S_FALSE otherwise.</returns>
        [PreserveSig]
        int TranslateAcceleratorIO(ref MSG msg);
    }

}

DeskBand，这里和GitHub上的程序不同的是，DeskBand直接继承的ElementHost类，GitHub上的好像是多例的，我想要的是单例的，所以修改了一下。这里粘的代码是WPF的，如果你想实现Winform的，就让DeskBand继承UserControl，DeskBand代码如下：

// Copyright(c) 2017 Patrick Becker
//
// Visit the Project page for more information.
// https://github.com/patbec/TaskbarSampleExtension

using Microsoft.Win32;
using System;
using System.ComponentModel;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using MyDiskInfo.Interop;
using System.Windows.Forms.Integration;
using Utils;
using System.Threading;
using System.Windows.Interop;

namespace MyDiskInfo
{
    /// <summary>
    /// Basic class for a DeskBand object
    /// </summary>
    /// <example>
    /// [ComVisible(true)]
    /// [Guid("00000000-0000-0000-0000-000000000000")]
    /// [DeskBandInfo("Beispiel Erweiterung", "Diese ist eine Beispiel Erweiterung für die Taskleiste.")]
    /// public class SampleExtension : DeskBand
    /// { /*...*/ }
    /// </example>
    public class DeskBand : ElementHost, IObjectWithSite, IDeskBand2, IPersistStream, IInputObject
    {
        [DllImport("user32.dll", SetLastError = true)]
        public static extern int SetParent(IntPtr hWndChild, IntPtr hWndNewParent);

        private const int S_OK = ;
        private const int E_NOTIMPL = unchecked((int)0x80004001);

        protected IInputObjectSite DeskBandSite;

        public DeskBand()
        {
            InitializeComponent();
        }

        private void InitializeComponent()
        {
            this.Name = "DeskBand";
        }

        #region Properties

        /// <summary>
        /// Title of the band object, displayed by default on the left or top of the object.
        /// </summary>
        [Browsable(true)]
        [DefaultValue("")]
        public String Title { get; set; }

        /// <summary>
        /// Minimum size of the band object. Default value of -1 sets no minimum constraint.
        /// </summary>
        [Browsable(true)]
        [DefaultValue(typeof(Size), "-1,-1")]
        public Size MinSize { get; set; }

        /// <summary>
        /// Maximum size of the band object. Default value of -1 sets no maximum constraint.
        /// </summary>
        [Browsable(true)]
        [DefaultValue(typeof(Size), "-1,-1")]
        public Size MaxSize { get; set; }

        /// <summary>
        /// Minimum vertical size of the band object. Default value of -1 sets no maximum constraint. (Used when the taskbar is aligned vertically.)
        /// </summary>
        [Browsable(true)]
        [DefaultValue(typeof(Size), "-1,-1")]
        public Size MinSizeVertical { get; set; }

        /// <summary>
        /// Says that band object's size must be multiple of this size. Defauilt value of -1 does not set this constraint.
        /// </summary>
        [Browsable(true)]
        [DefaultValue(typeof(Size), "-1,-1")]
        public Size IntegralSize { get; set; }

        #endregion

        #region IObjectWithSite

        public int SetSite([In, MarshalAs(UnmanagedType.IUnknown)] Object pUnkSite)
        {
            try
            {
                if (DeskBandSite != null) Marshal.ReleaseComObject(DeskBandSite);

                if (pUnkSite != null)
                {
                    var oleWindow = (IOleWindow)pUnkSite;
                    IntPtr pHandle = IntPtr.Zero;
                    oleWindow.GetWindow(out pHandle);
                    SetParent(this.Handle, pHandle);

                    DeskBandSite = (IInputObjectSite)pUnkSite;
                    LogUtil.Log("SetSite S_OK");
                    return WinError.S_OK;
                }
                else
                {
                    LogUtil.Log("SetSite E_FAIL");
                    return WinError.E_FAIL;
                }
            }
            catch (Exception ex)
            {
                LogUtil.Error(ex, "SetSite error");
                return WinError.E_FAIL;
            }
        }

        public int GetSite(ref Guid riid, [MarshalAs(UnmanagedType.IUnknown)] out IntPtr ppvSite)
        {
            try
            {
                if (DeskBandSite != null)
                {
                    var pUnknown = Marshal.GetIUnknownForObject(DeskBandSite);
                    var result = Marshal.QueryInterface(pUnknown, ref riid, out ppvSite);
                    Marshal.Release(pUnknown);

                    LogUtil.Log("GetSite " + result);
                    return result;
                }
                else
                {
                    LogUtil.Log("GetSite E_FAIL");
                    ppvSite = IntPtr.Zero;
                    return WinError.E_FAIL;
                }
            }
            catch (Exception ex)
            {
                LogUtil.Error(ex, "GetSite error");
                Thread.Sleep();
                ppvSite = IntPtr.Zero;
                return WinError.E_FAIL;
            }
        }

        #endregion

        #region IDeskBand2

        public virtual int CanRenderComposited(out bool pfCanRenderComposited)
        {
            pfCanRenderComposited = true;
            return S_OK;
        }

        public int SetCompositionState(bool fCompositionEnabled)
        {
            fCompositionEnabled = true;
            return S_OK;
        }

        public int GetCompositionState(out bool pfCompositionEnabled)
        {
            pfCompositionEnabled = false;
            return S_OK;
        }

        public int GetBandInfo(uint dwBandID, DESKBANDINFO.DBIF dwViewMode, ref DESKBANDINFO pdbi)
        {
            if (pdbi.dwMask.HasFlag(DESKBANDINFO.DBIM.DBIM_MINSIZE))
            {
                // Support for a vertical taskbar
                // Most examples have no support for a vertical taskbar. Who in hell uses their taskbar vertically? Me! Very practical on a 21:9 monitor.
                if (dwViewMode.HasFlag(DESKBANDINFO.DBIF.DBIF_VIEWMODE_FLOATING) || dwViewMode.HasFlag(DESKBANDINFO.DBIF.DBIF_VIEWMODE_VERTICAL))
                {
                    pdbi.ptMinSize.Y = this.MinSizeVertical.Width;
                    pdbi.ptMinSize.X = this.MinSizeVertical.Height;
                }
                else
                {
                    pdbi.ptMinSize.X = this.MinSize.Width;
                    pdbi.ptMinSize.Y = this.MinSize.Height;
                }
            }
            if (pdbi.dwMask.HasFlag(DESKBANDINFO.DBIM.DBIM_MAXSIZE))
            {
                if (dwViewMode.HasFlag(DESKBANDINFO.DBIF.DBIF_VIEWMODE_FLOATING) || dwViewMode.HasFlag(DESKBANDINFO.DBIF.DBIF_VIEWMODE_VERTICAL))
                {
                    pdbi.ptMaxSize.Y = this.MaxSize.Width;
                    pdbi.ptMaxSize.X = this.MaxSize.Height;
                }
                else
                {
                    pdbi.ptMaxSize.X = this.MaxSize.Width;
                    pdbi.ptMaxSize.Y = this.MaxSize.Height;
                }
            }
            if (pdbi.dwMask.HasFlag(DESKBANDINFO.DBIM.DBIM_INTEGRAL))
            {
                if (dwViewMode.HasFlag(DESKBANDINFO.DBIF.DBIF_VIEWMODE_FLOATING) || dwViewMode.HasFlag(DESKBANDINFO.DBIF.DBIF_VIEWMODE_VERTICAL))
                {
                    pdbi.ptIntegral.Y = this.IntegralSize.Width;
                    pdbi.ptIntegral.X = this.IntegralSize.Height;
                }
                else
                {
                    pdbi.ptIntegral.X = this.IntegralSize.Width;
                    pdbi.ptIntegral.Y = this.IntegralSize.Height;
                }
            }

            if (pdbi.dwMask.HasFlag(DESKBANDINFO.DBIM.DBIM_ACTUAL))
            {
                if (dwViewMode.HasFlag(DESKBANDINFO.DBIF.DBIF_VIEWMODE_FLOATING) || dwViewMode.HasFlag(DESKBANDINFO.DBIF.DBIF_VIEWMODE_VERTICAL))
                {
                    pdbi.ptActual.Y = this.Size.Width;
                    pdbi.ptActual.X = this.Size.Height;
                }
                else
                {
                    pdbi.ptActual.X = this.Size.Width;
                    pdbi.ptActual.Y = this.Size.Height;
                }
            }

            if (pdbi.dwMask.HasFlag(DESKBANDINFO.DBIM.DBIM_TITLE))
            {
                pdbi.wszTitle = this.Title;
            }

            pdbi.dwModeFlags = DESKBANDINFO.DBIMF.DBIMF_ALWAYSGRIPPER | DESKBANDINFO.DBIMF.DBIMF_NORMAL | DESKBANDINFO.DBIMF.DBIMF_VARIABLEHEIGHT;
            pdbi.dwMask = pdbi.dwMask | DESKBANDINFO.DBIM.DBIM_BKCOLOR | DESKBANDINFO.DBIM.DBIM_TITLE; // Testen

            return S_OK;
        }

        public int GetWindow(out IntPtr phwnd)
        {
            phwnd = Handle;
            return S_OK;
        }

        public int ContextSensitiveHelp(bool fEnterMode)
        {
            return S_OK;
        }

        public int ShowDW([In] bool fShow)
        {
            if (fShow)
                Show();
            else
                Hide();

            return S_OK;
        }

        public virtual void ClearResources()
        {
        }

        public int CloseDW([In] uint dwReserved)
        {
            ClearResources();
            Dispose(true);
            return S_OK;
        }

        public int ResizeBorderDW(RECT prcBorder, [In, MarshalAs(UnmanagedType.IUnknown)] IntPtr punkToolbarSite, bool fReserved)
        {
            return E_NOTIMPL;
        }

        #endregion

        #region Implementation of IPersistStream

        int IPersistStream.GetClassID(out Guid pClassID)
        {
            //  Log key events.

            //  Return the server class id.
            pClassID = this.GetType().GUID;

            //  Return success.
            return WinError.S_OK;
        }

        int IPersistStream.IsDirty()
        {
            //  Log key events.

            //  TODO: return S_OK to indicate the object has changed
            //  since the last time is was saved to a stream.

            //  Until we need explorer bar persistence, we're not dirty.
            return WinError.S_FALSE;
        }

        int IPersistStream.Load(object pStm)
        {
            //  Log key events.

            //  Not implemented: Explorer provided Persistence.
            return WinError.S_OK;
        }

        int IPersistStream.Save(IntPtr pStm, bool fClearDirty)
        {
            //  Log key events.

            //  Not implemented: Explorer provided Persistence.
            return WinError.S_OK;
        }

        int IPersistStream.GetSizeMax(out ulong pcbSize)
        {
            //  Log key events.

            //  Not implemented: Explorer provided Persistence.
            pcbSize = ;
            return WinError.S_OK;
        }

        int IPersist.GetClassID(out Guid pClassID)
        {
            //  Log key events.

            //  The class ID is just a unique identifier for the class, meaning
            //  that we can use the class GUID as it will be provided for
            //  all SharpShell servers.
            pClassID = this.GetType().GUID;

            //  Return success.
            return WinError.S_OK;
        }

        #endregion

        #region Implementation of IInputObject

        /// <summary>
        /// UI-activates or deactivates the object.
        /// </summary>
        /// <param name="fActivate">Indicates if the object is being activated or deactivated. If this value is nonzero, the object is being activated. If this value is zero, the object is being deactivated.</param>
        /// <param name="msg">A pointer to an MSG structure that contains the message that caused the activation change. This value may be NULL.</param>
        /// <returns>
        /// If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
        /// </returns>
        int IInputObject.UIActivateIO(bool fActivate, ref MSG msg)
        {

            //  We're done.
            return WinError.S_OK;
        }

        /// <summary>
        /// Determines if one of the object's windows has the keyboard focus.
        /// </summary>
        /// <returns>
        /// Returns S_OK if one of the object's windows has the keyboard focus, or S_FALSE otherwise.
        /// </returns>
        int IInputObject.HasFocusIO()
        {
            return WinError.S_OK;
        }

        /// <summary>
        /// Enables the object to process keyboard accelerators.
        /// </summary>
        /// <param name="msg">The address of an MSG structure that contains the keyboard message that is being translated.</param>
        /// <returns>
        /// Returns S_OK if the accelerator was translated, or S_FALSE otherwise.
        /// </returns>
        int IInputObject.TranslateAcceleratorIO(ref MSG msg)
        {
            return WinError.S_OK;
        }

        #endregion

        #region Register / Unregister

        [ComRegisterFunctionAttribute]
        public static void Register(Type t)
        {
            string guid = t.GUID.ToString("B");

            DeskBandInfoAttribute[] deskBandInfo = (DeskBandInfoAttribute[])
            t.GetCustomAttributes(typeof(DeskBandInfoAttribute), false);

            // Register only the extension if the attribute DeskBandInfo is used.
            if (deskBandInfo.Length == )
            {
                RegistryKey rkClass = Registry.ClassesRoot.CreateSubKey(@"CLSID\" + guid);
                RegistryKey rkCat = rkClass.CreateSubKey("Implemented Categories");

                string _displayName = t.Name;
                string _helpText = t.Name;

                if (deskBandInfo[].DisplayName != null)
                {
                    _displayName = deskBandInfo[].DisplayName;
                }

                if (deskBandInfo[].HelpText != null)
                {
                    _helpText = deskBandInfo[].HelpText;
                }

                rkClass.SetValue(null, _displayName);
                rkClass.SetValue("MenuText", _displayName);
                rkClass.SetValue("HelpText", _helpText);

                // TaskBar
                rkCat.CreateSubKey("{00021492-0000-0000-C000-000000000046}");

                Console.WriteLine(String.Format("{0} {1} {2}", guid, _displayName, "successfully registered."));
            }
            else
            {
                Console.WriteLine(guid + " has no attributes");
            }
        }

        [ComUnregisterFunctionAttribute]
        public static void Unregister(Type t)
        {
            string guid = t.GUID.ToString("B");

            DeskBandInfoAttribute[] deskBandInfo = (DeskBandInfoAttribute[])
            t.GetCustomAttributes(typeof(DeskBandInfoAttribute), false);

            if (deskBandInfo.Length == )
            {
                string _displayName = t.Name;

                if (deskBandInfo[].DisplayName != null)
                {
                    _displayName = deskBandInfo[].DisplayName;
                }

                Registry.ClassesRoot.CreateSubKey(@"CLSID").DeleteSubKeyTree(guid);

                Console.WriteLine(String.Format("{0} {1} {2}", guid, _displayName, "successfully removed."));
            }
            else
            {
                Console.WriteLine(guid + " has no attributes");
            }
        }

        #endregion

    }
}

DiskInfo，该类继承DeskBand，用于实现业务和界面，代码如下：

using DataStruct;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using WCFServer;

namespace MyDiskInfo
{
    /// <summary>
    /// 固态硬盘信息显示控件
    /// </summary>
    public partial class DiskInfoCtrl : UserControl
    {
        #region 字段
        private Thread _thread = null;
        private IClientServer _client = new ClientServer();
        private double _width = ;
        private double _height = ;
        private int _interval =  * ; //刷新间隔
        private DiskModel _diskInfo = null;
        private DiskInfoViewModel _model = new DiskInfoViewModel();
        #endregion

        #region 构造函数
        public DiskInfoCtrl()
        {
            InitializeComponent();

            //尺寸
            this.Width = _width;
            this.Height = _height;

            this.DataContext = _model;

            ShowDiskInfo();

            _thread = new Thread(new ThreadStart(() =>
            {
                while (true)
                {
                    Thread.Sleep(_interval);

                    ShowDiskInfo();
                }
            }));
            _thread.Start();
        }
        #endregion

        #region 显示硬盘信息
        /// <summary>
        /// 显示硬盘信息
        /// </summary>
        private void ShowDiskInfo()
        {
            BackWork.Run(() =>
            {
                _diskInfo = _client.GetDiskInfo();
            }, () =>
            {
                _model.Info = string.Format("{0}G {1}G {2}PE", _diskInfo.LBA_TodayWrite, _diskInfo.LBA_Write, _diskInfo.PE);
            }, (ex) => { });
        }
        #endregion

        #region 释放资源
        public void ClearResources()
        {
            if (_thread != null)
            {
                _thread.Abort();
                _thread = null;
            }
        }
        #endregion

    }

    #region DiskInfoViewModel
    public class DiskInfoViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        private string _Info;
        public string Info
        {
            get { return _Info; }
            set
            {
                _Info = value;
                OnPropertyChanged("Info");
            }
        }

        public void OnPropertyChanged(string name)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(name));
            }
        }
    }
    #endregion

}

实现业务界面的WPF用户控件：

XAML：

<UserControl x:Class="MyDiskInfo.DiskInfoCtrl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             mc:Ignorable="d"
             d:DesignHeight="30" d:DesignWidth="120" >
    <Grid>
        <TextBlock Text="{Binding Info}" FontFamily="微软雅黑" FontSize="12" Foreground="White" TextAlignment="Center" HorizontalAlignment="Center" VerticalAlignment="Center"></TextBlock>
    </Grid>
</UserControl>
    

后台代码：

using DataStruct;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using WCFServer;

namespace MyDiskInfo
{
    /// <summary>
    /// 固态硬盘信息显示控件
    /// </summary>
    public partial class DiskInfoCtrl : UserControl
    {
        #region 字段
        private Thread _thread = null;
        private IClientServer _client = new ClientServer();
        private double _width = ;
        private double _height = ;
        private int _interval =  * ; //刷新间隔
        private DiskModel _diskInfo = null;
        private DiskInfoViewModel _model = new DiskInfoViewModel();
        #endregion

        #region 构造函数
        public DiskInfoCtrl()
        {
            InitializeComponent();

            //尺寸
            this.Width = _width;
            this.Height = _height;

            _diskInfo = _client.GetDiskInfo();
            _model.Info = string.Format("{0}G {1}G {2}PE", _diskInfo.LBA_TodayWrite, _diskInfo.LBA_Write, _diskInfo.PE);
            this.DataContext = _model;

            _thread = new Thread(new ThreadStart(() =>
            {
                while (true)
                {
                    Thread.Sleep(_interval);

                    BackWork.Run(() =>
                    {
                        _diskInfo = _client.GetDiskInfo();
                    }, () =>
                    {
                        _model.Info = string.Format("{0}G {1}G {2}PE", _diskInfo.LBA_TodayWrite, _diskInfo.LBA_Write, _diskInfo.PE);
                    }, (ex) => { });
                }
            }));
            _thread.Start();
        }
        #endregion

        #region 释放资源
        public void ClearResources()
        {
            if (_thread != null)
            {
                _thread.Abort();
                _thread = null;
            }
        }
        #endregion

    }

    #region DiskInfoViewModel
    public class DiskInfoViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        private string _Info;
        public string Info
        {
            get { return _Info; }
            set
            {
                _Info = value;
                OnPropertyChanged("Info");
            }
        }

        public void OnPropertyChanged(string name)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(name));
            }
        }
    }
    #endregion

}

类库是需要签名的：

其它代码就不粘了，上面粘的代码，去掉业务代码，写个测试的界面，也可以跑起来，程序写好后，怎么安装呢，我写了个Install.bat代码如下：

@echo off

"%~dp0gacutil.exe" /if "%~dp0MyDiskInfo.dll"
"%~dp0RegAsm.exe" "%~dp0MyDiskInfo.dll"
reg import "%~dp0register.reg"

"%~dp0ServiceInstallUtil\InstallUtil.exe" "%~dp0MyDiskInfoService.exe"
sc config MyDiskInfoService start= auto
sc config MyDiskInfoService type= interact type= own
net start MyDiskInfoService

taskkill /f /im explorer.exe
start explorer.exe 

Pause

我是Win10系统，由于GitHub上的，安装之后DeskBand并没有显示在Windows工具栏菜单中，可能是注册表写的位置不对，我写了个register.reg，代码如下：

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\CLSID\{C7B92F87-7E59-467F-A6FF-9518DADA1C2C}]
@="DiskInfo"
"MenuText"="DiskInfo"
"HelpText"="Show DiskInfo"

[HKEY_CLASSES_ROOT\CLSID\{C7B92F87-7E59-467F-A6FF-9518DADA1C2C}\Implemented Categories]

[HKEY_CLASSES_ROOT\CLSID\{C7B92F87-7E59-467F-A6FF-9518DADA1C2C}\Implemented Categories\{00021492-0000-0000-C000-000000000046}]

[HKEY_CLASSES_ROOT\CLSID\{C7B92F87-7E59-467F-A6FF-9518DADA1C2C}\Implemented Categories\{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}]

[HKEY_CLASSES_ROOT\CLSID\{C7B92F87-7E59-467F-A6FF-9518DADA1C2C}\InprocServer32]
@="mscoree.dll"
"ThreadingModel"="Both"
"Class"="MyDiskInfo.DiskInfo"
"Assembly"="MyDiskInfo, Version=1.0.0.0, Culture=neutral, PublicKeyToken=bec8b29cd4c20aff"
"RuntimeVersion"="v4.0.30319"

[HKEY_CLASSES_ROOT\CLSID\{C7B92F87-7E59-467F-A6FF-9518DADA1C2C}\InprocServer32\1.0.0.0]
"Class"="MyDiskInfo.DiskInfo"
"Assembly"="MyDiskInfo, Version=1.0.0.0, Culture=neutral, PublicKeyToken=bec8b29cd4c20aff"
"RuntimeVersion"="v4.0.30319"

[HKEY_CLASSES_ROOT\CLSID\{C7B92F87-7E59-467F-A6FF-9518DADA1C2C}\ProgId]
@="MyDiskInfo.DiskInfo"

最终效果图：

存在的问题：Win10系统下正常，Win7操作系统下，背景无法透明，如果DeskBand修改为继承Form并且设置TransparenceKey属性为BackColor，依然无法实现透明，最后放弃了。

由于DeskBand没有权限读取固态硬盘信息，我写了个Windows服务来读取信息，Windows服务的安全性设置为“这是完全可信的应用程序”，使用WCF实现进程间管道通信来把数据传给DeskBand显示。

Windows服务注册为开机启动，但是DeskBand不是开机启动，需要自己勾选能才显示出来，DeskBand的自动启动我没有实现，网上资料多是C++的，用勾子实现 (该问题已解决)。

完整代码如下：

MyDiskInfo_WPF版_固态硬盘写入量信息嵌入任务栏工具栏