c# winform 窗体失去焦点关闭(钩子实现)
先来一个辅助类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms; namespace HZCX.Utils
{
/// <summary>
/// 鼠标全局钩子
/// </summary>
public static class MouseHook
{
private const int WM_MOUSEMOVE = 0x200;
private const int WM_LBUTTONDOWN = 0x201;
private const int WM_RBUTTONDOWN = 0x204;
private const int WM_MBUTTONDOWN = 0x207;
private const int WM_LBUTTONUP = 0x202;
private const int WM_RBUTTONUP = 0x205;
private const int WM_MBUTTONUP = 0x208;
private const int WM_LBUTTONDBLCLK = 0x203;
private const int WM_RBUTTONDBLCLK = 0x206;
private const int WM_MBUTTONDBLCLK = 0x209; /// <summary>
/// 点
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public class POINT
{
public int x;
public int y;
} /// <summary>
/// 钩子结构体
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public class MouseHookStruct
{
public POINT pt;
public int hWnd;
public int wHitTestCode;
public int dwExtraInfo;
} public const int WH_MOUSE_LL = ; // mouse hook constant // 装置钩子的函数
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); // 卸下钩子的函数
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern bool UnhookWindowsHookEx(int idHook); // 下一个钩挂的函数
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam); // 全局的鼠标事件
public static event MouseEventHandler OnMouseActivity; // 钩子回调函数
public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam); // 声明鼠标钩子事件类型
private static HookProc _mouseHookProcedure;
private static int _hMouseHook = ; // 鼠标钩子句柄
/// <summary>
/// 启动全局钩子
/// </summary>
public static void Start()
{
// 安装鼠标钩子
if (_hMouseHook != )
{
Stop();
}
// 生成一个HookProc的实例.
_mouseHookProcedure = new HookProc(MouseHookProc); _hMouseHook = SetWindowsHookEx(WH_MOUSE_LL, _mouseHookProcedure, Marshal.GetHINSTANCE(System.Reflection.Assembly.GetEntryAssembly().GetModules()[]), ); //假设装置失败停止钩子
if (_hMouseHook == )
{
Stop();
throw new Exception("SetWindowsHookEx failed.");
}
} /// <summary>
/// 停止全局钩子
/// </summary>
public static void Stop()
{
bool retMouse = true; if (_hMouseHook != )
{
retMouse = UnhookWindowsHookEx(_hMouseHook);
_hMouseHook = ;
} // 假设卸下钩子失败
if (!(retMouse))
throw new Exception("UnhookWindowsHookEx failed.");
} /// <summary>
/// 鼠标钩子回调函数
/// </summary>
private static int MouseHookProc(int nCode, Int32 wParam, IntPtr lParam)
{
// 假设正常执行而且用户要监听鼠标的消息
if ((nCode >= ) && (OnMouseActivity != null))
{
MouseButtons button = MouseButtons.None;
int clickCount = ; switch (wParam)
{
case WM_LBUTTONDOWN:
button = MouseButtons.Left;
clickCount = ;
break;
case WM_LBUTTONUP:
button = MouseButtons.Left;
clickCount = ;
break;
case WM_LBUTTONDBLCLK:
button = MouseButtons.Left;
clickCount = ;
break;
case WM_RBUTTONDOWN:
button = MouseButtons.Right;
clickCount = ;
break;
case WM_RBUTTONUP:
button = MouseButtons.Right;
clickCount = ;
break;
case WM_RBUTTONDBLCLK:
button = MouseButtons.Right;
clickCount = ;
break;
}
if (button != MouseButtons.None && clickCount>)
{
// 从回调函数中得到鼠标的信息
MouseHookStruct MyMouseHookStruct = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct));
MouseEventArgs e = new MouseEventArgs(button, clickCount, MyMouseHookStruct.pt.x, MyMouseHookStruct.pt.y, );
OnMouseActivity(null, e);
}
} // 启动下一次钩子
int inext = CallNextHookEx(_hMouseHook, nCode, wParam, lParam);
return inext;
}
}
}
Program的main函数里面调用 MouseHook.Start();
main函数里面写 Application.ApplicationExit += Application_ApplicationExit;
static void Application_ApplicationExit(object sender, EventArgs e)
{
MouseHook.Stop();
}
窗体load里面写 HZCX.Utils.MouseHook.OnMouseActivity += hook_OnMouseActivity;
窗体closing里面写 HZCX.Utils.MouseHook.OnMouseActivity -= hook_OnMouseActivity;
void hook_OnMouseActivity(object sender, MouseEventArgs e)
{
try
{
if (this._isLoseFocusClose && e.Clicks > )
{
if (e.Button == System.Windows.Forms.MouseButtons.Left || e.Button == System.Windows.Forms.MouseButtons.Right)
{
if (!this.IsDisposed)
{
if (!this.ClientRectangle.Contains(this.PointToClient(e.Location)))
{
base.Close();
}
}
}
}
}
catch { }
}
就这样了
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