[System.Runtime.InteropServices.DllImport("user32.dll")]public static extern long SendMessage(Int hWnd, int Msg, int wParam, object lParam);const WM_KEYDOWN = &H100SendMessage(this.Handle, WM_KEYDOWN, 0, Keys.X)注意下,API函数的申明有改过其实你可以直接使用sendkeys来实现