Regular MFC (4.1) Dll and message pump

I have a typical problem of message pump: my modeless dialogs don't react to windows messages, because of no message pump in the WinApp of my dll (statically linked with MFC 4.1).

In Msdn, they say: From the calling application, call an exported function wich PreTranslate the message in the Dll message pump.

OK with MFC Application, but in VB? I try many solution (Subclassing the WindowProc, ...), but i have always stack overflow or other crashes...

How to do that kind of operation?

Thx a lot!