"Benny Raymond" <benny@pocketrocks.com> wrote in message
news:%23lTtZT8xFHA.612@TK2MSFTNGP10.phx.gbl...
>I need to be able to process the message WM_MOVING and WM_MOVE, however I
>noticed that the following breakpoint in PreProcessMessage isn't hit on
>move (it does get hit when I press alt for instance though). It does get
>hit on the WndProc, however I can't return a true here, so it's worthless
>for me... Any help would be awesome:
>
> ==== start code ====
> public const int WM_MOVING = 0x0216;
> public const int WM_MOVE = 0x0003;
> protected override void WndProc(ref Message m)
> {
> switch (msg.Msg)
> {
> case WM_MOVING:
> {
> Debug.WriteLine("break on this line");
> //return true;
> break;
> }
> case WM_MOVE:
> {
> Debug.WriteLine("break on this line");
> //return true;
> break;
> }
> }
> base.WndProc(ref m);
> }
>
>
> public override bool PreProcessMessage(ref Message msg)
> {
> switch (msg.Msg)
> {
> case WM_MOVING:
> {
> Debug.WriteLine("break on this line");
> return true;
> break;
> }
> case WM_MOVE:
> {
> Debug.WriteLine("break on this line");
> return true;
> break;
> }
> }
> return base.PreProcessMessage (ref msg);
> }
> ==== end code ====

> Benny,
>
> The documentation for PreProcessMessage states:
>
> PreProcessMessage is called by the application's message loop to
preprocess
> input messages before they are dispatched. Possible values for the msg
> parameter are WM_KEYDOWN, WM_SYSKEYDOWN, WM_CHAR, and WM_SYSCHAR.
>
> To that end, that will not be called for mouse movement.
>
> You should be able to overrid the WndProc method. Instead of
returning
> true though, just return the return value from the base implementation.
>
> Hope this helps.
>
> --
> - Nicholas Paldino [.NET/C# MVP]
> - mvp@spam.guard.caspershouse.com
>
> "Benny Raymond" <benny@pocketrocks.com> wrote in message
> news:%23lTtZT8xFHA.612@TK2MSFTNGP10.phx.gbl...
> >I need to be able to process the message WM_MOVING and WM_MOVE, however I
> >noticed that the following breakpoint in PreProcessMessage isn't hit on
> >move (it does get hit when I press alt for instance though). It does get
> >hit on the WndProc, however I can't return a true here, so it's worthless
> >for me... Any help would be awesome:
> >
> > ==== start code ====
> > public const int WM_MOVING = 0x0216;
> > public const int WM_MOVE = 0x0003;
> > protected override void WndProc(ref Message m)
> > {
> > switch (msg.Msg)
> > {
> > case WM_MOVING:
> > {
> > Debug.WriteLine("break on this line");
> > //return true;
> > break;
> > }
> > case WM_MOVE:
> > {
> > Debug.WriteLine("break on this line");
> > //return true;
> > break;
> > }
> > }
> > base.WndProc(ref m);
> > }
> >
> >
> > public override bool PreProcessMessage(ref Message msg)
> > {
> > switch (msg.Msg)
> > {
> > case WM_MOVING:
> > {
> > Debug.WriteLine("break on this line");
> > return true;
> > break;
> > }
> > case WM_MOVE:
> > {
> > Debug.WriteLine("break on this line");
> > return true;
> > break;
> > }
> > }
> > return base.PreProcessMessage (ref msg);
> > }
> > ==== end code ====
>
>