C#中实现屏蔽Ctrl+C的方法

public class MyTextBox : TextBox
{
  public const int WM_COPY = 0x301;
  public const int WM_CUT = 0x300;
  protected override void WndProc(ref Message m)
  {
    if (m.Msg == WM_COPY || m.Msg == WM_CUT) return;//不处理
    base.WndProc(ref m);
  }
}
Clipboard.SetDataObject(null);