Hello

I hope I am in the correct newsgroup, if not please let me know.

I am trying to build a sample for using a certain library ( IFC mapping
to C++ classes, see www.cstb.fr) with MS Visual Studio 2003.
When building a sample program, I get the error mentioned in the title:
LNK2019
Here is a snippet of the error message:

---
main.obj : error LNK2019: unresolved external symbol
"__declspec(dllimport) public: bool __thiscall
IFC20_LONGFORM::SPFwriter::writeSPF(class IFC20_LONGFORM::Model *,class
std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char> > const &)"
(__imp_?writeSPF@SPFwriter@IFC20_LONGFORM@@QAE_NPAVModel@2@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z)
referenced in function _main

main.obj : error LNK2019: unresolved external symbol
"__declspec(dllimport) public: class IFC20_LONGFORM::Model * __thiscall
IFC20_LONGFORM::SPFreader::readSPF(class std::basic_string<char,struct
std::char_traits<char>,class std::allocator<char> > const &)"
(__imp_?readSPF@SPFreader@IFC20_LONGFORM@@QAEPAVModel@2@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@@Z)
referenced in function _main

Debug/CSTBTest2_Console.exe : fatal error LNK1120: 2 unresolved
externals
---

What I have found so far on the net wasn't very helpful. I have read
somewhere, that the reason of the error could have something to do with
different versions of VC (since the libraries were programmed in 2000,
they were probably built with VC5 or 6, I dont know if that is a
problem)

Does anyone know what I can do about this error?

thanks alot in advance!