Including a C DLL in a windev project

Hi everyone,
I am trying to include some C code written in Visual C++ 6 in my WinDev 12 project. I suppose I have to create a DLL from this code in order to embed it in WD. But it is not clear to me how I can include it in my project, I read the help but am still a little confused. Could I use CallDLL32 to use the functions in the DLL? or must I use the Automation functions? Can someone please post a step-by-step guide on how to include my custom C code in WinDev? thanks!!

Message forwarded from pcsoft.us.windev

noprop at all u can do :

F.I.

//Testdll.h the Header file

#ifdef TESTDLL_EXPORTS
#define WDEXPORT extern "C" __declspec(dllexport)
#else
#define WDEXPORT  extern "C" __declspec(dllimport)
#endif


// define your exported functions
WDEXPORT int fntestdll(void);
WDEXPORT void fninc(int* intptr);

// Testdll.cpp

#include "stdafx.h"
#include "testdll.h"


BOOL APIENTRY DllMain( HANDLE hModule, 
                       DWORD  ul_reason_for_call, 
                       LPVOID lpReserved
					 )
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
	case DLL_THREAD_ATTACH:
	case DLL_THREAD_DETACH:
	case DLL_PROCESS_DETACH:
		break;
	}
    return TRUE;
}


// This is an example of exported functions.
WDEXPORT int fntestdll(void)
{
	return 42; // what else 
}
WDEXPORT void fninc(int* intptr)
{
	++*intptr;
}


//WINDEV 
res is int = API("TestDLL", "fntestdll")

//or
res is int = 100
API("TestDLL", "fninc", &res)
Trace(res) // 101

3 hints :
add WDEXPORT to the function you wanna access from WD.
pass structures as references use : &,
be very carefule in case that you find char* !!!
HTH