Hello,

I've got some questions about __declspec dllimprt and dllexport. Can anyone tell me why this code doesn't work?

Code:
// DLL.h

#ifndef _CLIBRARY_H_
#define _CLIBRARY_H_

#ifdef CLIBRARY_EXPORTS
#	define CLIBRARY_API __declspec(dllexport)
#else
#	define CLIBRARY_API __declspec(dllimport)
#endif


extern "C"  {
	CLIBRARY_API
	unsigned long ShowMessage(
		const char*			// message
	);
}

#endif
Code:
// DLL.cpp

#include "stdafx.h"

extern "C" 
{
	ULONG ShowMessage(LPCSTR lpszMessage)
	{
		MessageBox(NULL, lpszMessage, "Message", 0);
		return strlen(lpszMessage);
	}
}
Code:
// main.cpp

#pragma comment( lib, "..\\..\\C++Library\\Release\\C++Library.lib" )

#include <iostream>
#include "..\\..\\C++Library\\C++Library\\C++Library.h"

using namespace std;




int main( int argc, char** argv )
{
	cout << ShowMessage("Dies ist ein Test") << endl;

	return 0;
}

My Compiler (VC 9) creates this output:
Code:
Error	1	error LNK2019: unresolved external symbol __imp__ShowMessage referenced in function _main	main.obj	Link_Load Library

Thanks in anticipation for some help ;-)