Question

3I’m learning how to use C++ to write DLLs and am following this tutorial video to get me started. I follow along exactly, my code being:

defFile.def:

LIBRARY "square"
EXPORTS 
square

funct.cpp:

double __stdcall square(double & x) 
{
    return x*x;
}

When trying to Build using VSE 2010, I get the following error:

1>------ Build started: Project: square, Configuration: Debug Win32 ------
1>  defFile.def
1>c:\documents and settings\~\my documents\visual studio 2010\projects\square\square\deffile.def(2): error C2143: syntax error : missing ';' before 'string'
1>c:\documents and settings\~\my documents\visual studio 2010\projects\square\square\deffile.def(2): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

I’ve tried adding #include <string> at the top of defFile.def, but still get the same error. I’m sure this is something really simple.

Answer 1

You added the .def file to your project. It is getting compiled as though it is a source code file. That can’t work.

Right-click your project, Properties, Linker, Input. Set the Module Definition File setting to “defFile.def”.