private void Func_left_callBack()
 {
     //MessageBox.Show( "Ctrl + Shift + Alt + Left 快捷键" );
     h.Keybd_event(HotKeys.key_Win, 0, 0, 0);              //模拟按下win键
     h.Keybd_event(HotKeys.key_Control, 0, 0, 0);          //模拟按下Alt键
     h.Keybd_event(HotKeys.key_Left, 0, 0, 0);             //模拟按下Alt键
     //松开按钮不能少
     h.Keybd_event(HotKeys.key_Win, 0, 2, 0);
     h.Keybd_event(HotKeys.key_Control, 0, 2, 0);
     h.Keybd_event(HotKeys.key_Left, 0, 2, 0);
 }