Calling non-DLL function from DLL function

Question

I am writting a DLL:

#include "stdafx.h" _DLLAPI int __stdcall myDLLFunc() { return test(4); } int test(int arg) { return arg * arg; }

But when I try to compile it in MS VC++ Express it says:

error C3861: 'test': identifier not found

How do I call test from myDLLFunc? Am I missing the obvious?

Thanks in advance.

Steve Townsend · Accepted Answer · 2011-01-12 18:35:17Z

Put the called function ahead of the caller in your code and it should compile. C++ does not do 'look ahead' for called functions, they must be declared ahead of any usage.

#include "stdafx.h" int test(int arg) { return arg * arg; }_DLLAPI int __stdcall myDLLFunc() { return test(4); }

Typically, you would keep the function's declaration separate (in a header file) from the definition (in the code file) to reduce dependency complexity.

Or you can do forward declaration of test() without moving test() above myDLLFunc().
@Ganesh - thanks, I added a note about header/code separation

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