问当在C#中打开两个子窗体时，WinForms密钥事件令人困惑。

EN

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
    {
        if ((keyData == Keys.Right) || (keyData == Keys.Left) ||
            (keyData == Keys.Up) || (keyData == Keys.Down))
        {
            //Do custom stuff or nothing.
            //true if key was processed by control, false otherwise
            return true;
        }
        else
        {
            return base.ProcessCmdKey(ref msg, keyData);
        }
    }