Capture all mouse events in user control

Question

I'm trying to capture all mouse events in a user control (even the ones that occur in child controls). For that I use the "override WndProc"-approach:

protected override void WndProc(ref Message m)
{
  System.Diagnostics.Debug.WriteLine(m.Msg.ToString());
  base.WndProc(ref m);
}

I'm especially interested in mouse events, but that does not seem to work. I do get mouse button up/down events, but I don't get mouse move and mouse wheel events.

Any ideas?

crypted crypted · Accepted Answer · 2011-12-12T09:48:40

Best you could do is implement IMessageFilter in your control.

 public class CustomMessageFilter:UserControl,IMessageFilter
{
    public bool PreFilterMessage(ref Message m)
    {
        //Process your message here
        throw new NotImplementedException();

    }
}

you can write your message filtering logic in PreFilterMessage Method. Then just install it to the list of Message Filter in Main method.

 Application.AddMessageFilter(new CustomMessageFilter());

This is a Application level hook, that means you can control all the Win32 message within application.

Capture all mouse events in user control

2 Answers