使用dll以及调用dll例子

1）以下是简单的使用dll的例子

#include "stdafx.h"

BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
return TRUE;
}

extern "C"
{

__declspec(dllexport) int HttpVIP(char * strContent,int * result)
{

return 0;

}

};

2）以下是调用dll的例子

#include "stdafx.h"

int _tmain(int argc, _TCHAR* argv[])
{

HINSTANCE Hdll = GetModuleHandle("dll.dll");

if (NULL == Hdll)

{

Hdll = LoadLibrary("dll.dll");

}
//HttpVIP(char * strContent,int * result)
typedef int (*TESTDLL)(char * strContent,int * result);
TESTDLL pHttpIVR;
pHttpIVR=(TESTDLL)GetProcAddress(Hdll,"HttpVIP");

int r;
int res=pHttpIVR("501",&r);
cout<<"res = "<<res<<endl;
FreeLibrary(Hdll); //在恰当的时候释放句柄。
return 0;
}