Having a problem of Vista XPSDrv filter to call an entry in other DLL

I built a pass through filter(stream in and stream out) and it worked fine. Then I tried calling an entry to one DLL built by VC8 or WDK. But the filter failed to load. The linker linked correctly. I think it might be caused by incorrect building process of the DLL. Can anyone give me some simple sample(codes, build file, environment) which works? Thanks.

[456 byte] By [DocComposer] at [2007-12-22]