protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
switch (keyData)
{
case Keys.Right:
_caret.StepForward();
break;
case Keys.Left:
_caret.StepBack();
break;
case Keys.Up:
_caret.Up();
break;
case Keys.Down:
_caret.Down(Lines);
break;
default:
break;
}
//若要调用KeyDown,这里一定要返回false才行,否则只响应重写方法里的按键.
//这里调用一下父类方向,相当于调用普通的KeyDown事件.//所以按空格会弹出两个对话框
return(base.ProcessCmdKey(ref msg, keyData));
}