Hi Benny, I am reporting some problems with building pjsua as DLL in Visual Studio 8. In VS8 solution I declare macros PJ_DLL and PJ_EXPORTING in projects whose functions I want to use (e.g. pjlib, pjmedia and pjsua-lib). In project pjsua-lib I set output as DLL. Macros PJ_EXPORT_DECL_SPECIFIER etc. are automaticaly defined in cc_msvc.h. First problem: In the solution there are no depencies on other projects so the projects won't be built and linked. I had to set the depencies manually to the same ones as in pjsua app. Second problem: See following compiler error: c:\pjproject-0.8.0\pjlib\src\pj\except.c(41) : error C2375: 'pj_throw_exception_' : redefinition; different linkage c:\pjproject-0.8.0\pjlib\include\pj\except.h(302) : see declaration of 'pj_throw_exception_' I don't know exactly what it means but commenting out the line //#define PJ_EXPORT_DEF_SPECIFIER __declspec(dllexport) in cc_msvc.h solves the problem. Have a nice day. Vali