Sorry if this has been covered in another topic, the forums search engine doesn't appear to be working today.

I am trying to design a system where I have dialog classes and a CContextCmd class. I want the dialogs to add pointers to command handlers in themselves to the CContextCmd. Then, if appropriate, I want that CContextCmd to be able to call those functions in those objects. So here is fragments of my code:

typedef BOOL (__cdecl CWnd::*MENU_HANDLER_PTR)( CContextCmd * );

BOOL CContextCmd::ExecuteMenuCommandEx( CMap<CString, LPCTSTR, MENU_HANDLER_PTR, MENU_HANDLER_PTR> *map, CWnd* window, UINT command )
{
...
MENU_HANDLER_PTR func;
if( !done && map->Lookup( cmd, func ) )
{
done = (window->*func)( this );
}
...}

BOOL CVendors::OnMenuNew( CContextCmd *cmd )
{...}

I was under the impression that this worked because OnMenuNew gets called when it should. However, I have recently noticed that the value of window in ExecuteMenuCommandEx is different than the value of this in OnMenuNew, which is quite a large problem.

I read about this notation for calling functions somewhere in MSDN when I originally designed it, but I can't seem to find that information anywhere now.

Anybody know what this is about or where I can get more information? Thanks,
Chad Hogg