C / C++ / MFC

<br />
#include "stdafx.h"<br />
#include "greet.h"<br />
#include <cstdio><br />
<br />
BOOL APIENTRY DllMain( HANDLE hModule, <br />
                       DWORD  ul_reason_for_call, <br />
                       LPVOID lpReserved<br />
					 )<br />
{<br />
	switch (ul_reason_for_call)<br />
	{<br />
	case DLL_PROCESS_ATTACH:<br />
	case DLL_THREAD_ATTACH:<br />
	case DLL_THREAD_DETACH:<br />
	case DLL_PROCESS_DETACH:<br />
		break;<br />
	}<br />
    return TRUE;<br />
}<br />
<br />
// This is an example of an exported variable<br />
GREET_API int ngreet=0;<br />
<br />
// This is an example of an exported function.<br />
GREET_API int fngreet(void)<br />
{<br />
	return 42;<br />
}<br />
<br />
// This is the constructor of a class that has been exported.<br />
// see greet.h for the class definition<br />
Cgreet::Cgreet()<br />
{ <br />
	return; <br />
}<br />
<br />
void Cgreet::run(int arg)<br />
{<br />
	printf("Hello World!\n");<br />
}<br />

<br />
#ifdef GREET_EXPORTS<br />
#define GREET_API __declspec(dllexport)<br />
#else<br />
#define GREET_API __declspec(dllimport)<br />
#endif<br />
<br />
// This class is exported from the greet.dll<br />
class GREET_API Cgreet {<br />
public:<br />
	Cgreet(void);<br />
	// TODO: add your methods here.<br />
<br />
	void run(int arg);<br />
};<br />
<br />
extern GREET_API int ngreet;<br />
<br />
GREET_API int fngreet(void);<br />

<br />
#include <cstdio><br />
#include <windows.h><br />
<br />
int main()<br />
{<br />
	HMODULE hdll = LoadLibrary("greet.dll");<br />
	if (hdll != NULL)<br />
	{<br />
		typedef int (*PFUNC)(void);<br />
<br />
		PFUNC greet = (PFUNC)GetProcAddress(hdll, "fngreet");<br />
		if (greet != NULL) {<br />
			// Now we can call the function in the DLL<br />
			printf("greet.dll returned: %d!\n", greet());<br />
		}<br />
		else<br />
			printf("Loading function 'fngreet' failed!\n");<br />
	}<br />
	else<br />
		printf("Loading library 'greet.dll' failed!\n");<br />
}<br />