Capturing key press messages

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
    const int WM_KEYDOWN = 0x100;
    const int WM_SYSKEYDOWN = 0x104;

    if ((msg.Msg == WM_KEYDOWN) || (msg.Msg == WM_SYSKEYDOWN))
    {
        switch (keyData)
        {
            case Keys.Down:
                this.Text = "Down Arrow Captured";
                break;

            case Keys.Up:
                this.Text = "Up Arrow Captured";
                break;

            case Keys.Tab:
                this.Text = "Tab Key Captured";
                break;

            case Keys.Control | Keys.M:
                this.Text = "<CTRL> + M Captured";
                break;

            case Keys.Alt | Keys.Z:
                this.Text = "<ALT> + Z Captured";
                break;
        }
    }

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