Solution to the implementation method of canceling the control focus of the arrow key in C#

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)//Cancel the control that the arrow keys focus on the control, and use your own custom functions to process the processing functions of each arrow key
        {
            switch (keyData)
            {
                case :
                    UpKey();
return true;//Not continue processing
                case :
                    DownKey();
                    return true;
                case :
                    LeftKey();
                    return true;
                case :
                    RightKey();
                    return true;
            }
            return (ref msg, keyData);
        }