using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace _04TextBox { public partia
关键代码: using System; using System.Runtime.InteropServices; using System.Windows.Forms; namespace WinFormUtilHelpV2 { /// <summary> /// 基于.NET 2.0的TextBox工具类 /// </summary> public static class TextBoxToolV2 { private const int EM_SETCUEBANNER =