解读在C#中winform程序响应键盘事件的详解

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
       {
           if (keyData == Keys.F4)
           {
               FormFastHitStates form = new FormFastHitStates();
               form.ShowDialog();
           }

           return true;
           //return base.ProcessCmdKey(ref msg, keyData);
       }