//注意繼承父類對(duì)象，System.Windows.Forms.TextBox
 public partial class NoCopyPasteTextBox : System.Windows.Forms.TextBox
 { // 系統(tǒng)消息常量：剪貼板操作相關(guān)
     private const int WM_COPY = 0x0301;    // 復(fù)制
     private const int WM_CUT = 0x0300;     // 剪切
     private const int WM_PASTE = 0x0302;   // 粘貼

     protected override void WndProc(ref Message m)
     {
         // 攔截復(fù)制、剪切、粘貼的系統(tǒng)消息
         if (m.Msg == WM_COPY || m.Msg == WM_CUT || m.Msg == WM_PASTE)
         {
             return; // 忽略消息，不執(zhí)行默認(rèn)操作
         }

         // 其他消息正常處理
         base.WndProc(ref m);
     }

     protected override void OnKeyDown(KeyEventArgs e)
     {
         // 攔截快捷鍵（雙重保險(xiǎn)）
         if ((e.Control && e.KeyCode == Keys.C) ||
             (e.Control && e.KeyCode == Keys.V) ||
             (e.Control && e.KeyCode == Keys.X))
         {
             e.Handled = true;
             e.SuppressKeyPress = true;
             return;
         }

         base.OnKeyDown(e);
     }

     public NoCopyPasteTextBox()
     {
         // 禁用右鍵菜單
         this.ContextMenu = new ContextMenu();
     }
 }