Re: VC DLLs work only in VC
Have you exported the function with extern "C". Function name decoration (or name mangling) is compiler dependant due to lack of a standard. This will cause a problem when trying to dynamically link to the function by name from another development tool. This could be avoided by using ordinal values instead. Search for extern C in the online help for more information.
Re: VC DLLs work only in VC
Also, VC generates some useful headers which help:
// If this DLL is dynamically linked against the MFC
// DLLs, any functions exported from this DLL which
// call into MFC must have the AFX_MANAGE_STATE macro
// added at the very beginning of the function.
//
// For example:
//
// extern "C" BOOL PASCAL EXPORT ExportedFunction()
// {
// AFX_MANAGE_STATE(AfxGetStaticModuleState());
// // normal function body here
// }
//
// It is very important that this macro appear in each
// function, prior to any calls into MFC. This means that
// it must appear as the first statement within the
// function, even before any object variable declarations
// as their constructors may generate calls into the MFC
// DLL.
//
// Please see MFC Technical Notes 33 and 58 for additional
// details.