🚀 go-pugleaf

Remy,

Well I said I would be back if I could not get this to work, and guess what,
I'm back. I setup a WH_MSGFILTER hook and I am not receiving any messages at
all through the hook. I have posted the code below, and please bear in mind
it is simply test code at this point so that I can try and understand how it
all works.

This is contained in a DLL and the calls to the DLL are working as I traced
them and saw the address assigned to the message hook handle.

Here is the calling procedure:

             hMsgFilterHook =   SetWindowsHookEx( WH_MSGFILTER ,

(HOOKPROC)MessageProc,

hInst,

0) ;


Here is the hook procedure:

LRESULT CALLBACK MessageProc(int nCode, WPARAM wParam, LPARAM lParam)
{
AnsiString DataVal
;


                   if ( nCode < 0 )
                   {
                         return CallNextHookEx (hMsgFilterHook, nCode,
wParam, lParam);
                    }

// this is only here to see if any messages are being seen inside the hook
                      DataVal               = "Filter Hook "
;
                      COPYDATASTRUCT cds     = {0}
;
                      cds.dwData             = 0x4D696B65;
                      cds.cbData             = DataVal.Length()
;
                      cds.lpData             = DataVal.c_str()
;

                      ::SendMessage( hWindowForMessages , WM_COPYDATA, 0,
reinterpret_cast<LPARAM>( &cds ) ) ;


                      if ( nCode == MSGF_MENU)
                     {
                           DataVal               = "Filter Hook -- Menu
Message"                                    ;

                           COPYDATASTRUCT cds     = {0}
;
                           cds.dwData             =  0x4D696B65;
                           cds.cbData              = DataVal.Length()
;
                           cds.lpData               = DataVal.c_str()
;

                           ::SendMessage( hWindowForMessages , WM_COPYDATA,
0, reinterpret_cast<LPARAM>( &cds ) ) ;

                          CWPSTRUCT *cwpsParam = (CWPSTRUCT *) lParam;

                          if( cwpsParam->message == WM_MENUSELECT )
                         {
                              DataVal               = "Filter Hook -- Menu
Select Message"    ;

                             COPYDATASTRUCT cds     = {0}
;
                             cds.dwData             = 0x4D696B65;
                            cds.cbData             = DataVal.Length()
;
                            cds.lpData             = DataVal.c_str()
;

                            ::SendMessage( hWindowForMessages , WM_COPYDATA,
0, reinterpret_cast<LPARAM>( &cds ) ) ;
                          }
                      }
                     return CallNextHookEx (hMsgFilterHook, nCode, wParam,
lParam);
}

So as I said I am not receiving any messages pumped through this hook. What
I am trying to accomplish is to find out what menu was opened in any
application running in the system.I am actually surprised I am not getting
anything through the hook.

So if you can point me in the right direction I would be most appreciated.

Thanks Mike




"Remy Lebeau (TeamB)" <no.spam@no.spam.com> wrote in message
news:41b412e1$1@newsgroups.borland.com...
>
> "mike" <mfbrowne@earthlink.net> wrote in message
> news:41b2766c$1@newsgroups.borland.com...
>
> > I have created a system wide windows message hook and I am trying
> > to figure out how to detect when a menu is selected. Here is the code
> > I am using right.
>
> You are using a WH_CALLWNDPROC hook, which is only invoked when
> SendMessage() is used to deliver a message to a window.  Try using a
> WH_GETMESSAGE hook as well so that you can intercept GetMessage() in
> addition to SendMessage().  Also, have a look at using a WH_MSGFILTER or
> WH_SYSMSGFILTER hook instead.  They can return menu-specific
notifications.
>
> > I never see a hit.
>
> How exactly did you install the hook?  You did not show that code.
>
>
> Gambit
>
>