Delphi调用VC++6.0编写的Dll
用VC++6.0编写了一个简单的dll，里面包含一个减法函数subtract(int a,int b)，Dll命名为ff.Dll
代码如下：
1.ff.cpp:
// ff.cpp : Defines the entry point for the DLL application.
//
#include "StdAfx.h"
#include "ff.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 an exported variable
FF_API int nFf=0;
// This is an example of an exported function.
FF_API int fnFf(void)
{
return 42;
}
// This is the constructor of a class that has been exported.
// see ff.h for the class definition
CFf::CFf()
{
return;
}
FF_API int subtract(int a,int b)
{
return (a-b);
}
2.StdAfx.cpp:
// stdafx.cpp : source file that includes just the standard includes
// ff.pch will be the pre-compiled header
// stdafx.obj will contain the pre-compiled type information
#include "stdafx.h"
#ifdef FF_EXPORTS
#define FF_API __declspec(dllexport)
#else
#define FF_API __declspec(dllimport)
#endif
// This class is exported from the ff.dll
class FF_API CFf {
public:
CFf(void);
// TODO: add your methods here.
};
extern FF_API int nFf;
FF_API int fnFf(void);
extern "C" FF_API int subtract(int a,int b);
// TODO: reference any additional headers you need in STDAFX.H
// and not in this file
3.ff.h:
// The following ifdef block is the standard way of creating macros which make ex
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