#include cause errors

Question

VS 2010 C++ CLR Library project, errors on adding comutil.h library

> Error 20  error LNK2001: unresolved
> external symbol \"extern \"C\" long
> __stdc         


        

Answer 1

According to MSDN, _bstr_t requires comsuppw.lib. Add this library to the linker dependencies list.

Answer 2

Add the requisite import library as per the documentation, likely Oleaut32.lib

http://msdn.microsoft.com/en-us/library/ms221236.aspx

edit: I'm assuming the Compiler COM Support library subsumes this and Alex's answer would be the preferred library.

Answer 3

try to include comdef.h, don't include comutil.h