The 3rd party to EXE calls like call backs work but call backs from 3rd party DLL to another DLL won't work. 3rd party DLL has to message the upper EXE or DLL that evetually gets emailed out. Working platform is Vista or Win 7.

We're going to need more information then that. What toolchain are you using? What commands are you using to compile said DLLS? Can you write a simplefied example with 2 ddls and 1 exe that reproduces the problem?

visual stduio is the IDE and working on reproducing it.

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