Register more than one hotkey with RegisterHotKey

Question

I found this little piece of code to register an hotkey:

    [DllImport(\"user32.dll\")]
    public static extern bool RegisterHotKey(IntPtr hWnd, int id, in         


        

Answer 1

 RegisterHotKey(this.Handle, this.GetType().GetHashCode(), 1, (int)'A')

Don't use GetHashCode() here. Just number your hot keys, start at 0. There isn't any danger of getting the ids mixed up, hot key ids are specific for each Handle. You'll get the id back in the WndProc() method. Use m.WParam.ToInt32() to get the value:

protected override void WndProc(ref Message m)
{
    if (m.Msg == 0x0312) {    // Trap WM_HOTKEY
        int id = m.WParam.ToInt32();
        MessageBox.Show(string.Format("Hotkey #{0} pressed", id));
    }
    base.WndProc(ref m);
}