参考网站:编写一个简单的COM组件_a ray of sunshine-CSDN博客
(1) 用MIDL编写.idl文件
//将以下代码保存成 IXIYIZ.idl 文件
//在命令行上进行编译,编译命令:
//midl IXIYIZ.idl
//生成 IXIYIZ.h ,dlldata.c, IXIYIZ.h, IXIYIZ_p.c
//其中 IXIYIZ.h,IXIYIZ.h 文件是我们目前所需要的
import "unknwn.idl";
[
object,
uuid(7F67119B-1E09-4d4f-B472-2106CCAE3275)
]
interface IX: IUnknown
{
[local]
void __stdcall Fx();
};
[
object,
uuid(A667947B-714A-4bde-B2DD-C090928D62FF)
]
interface IY: IUnknown
{
[local]
void __stdcall Fy();
};
[
object,
uuid(AA80F229-0809-4c69-B8AA-BB6F58DBC304)
]
interface IZ: IUnknown
{
[local]
void __stdcall Fz();
};
(2) 编写组件类的头文件
// 将以下代码保存成 CA.h
// 注意将(1)中生成的 IXIYIZ.h 头文件包含进来
#include<iostream>
#include"IXIYIZ.h"
using namespace std;
class CA : public IX, public IY
{
HRESULT __stdcall QueryInterface(const IID& iid, void ** ppv);
ULONG __stdcall AddRef(){return 0;}
ULONG __stdcall Release(){return 0;}
void __stdcall Fx(){cout<<"Fx"<<endl;}
void __stdcall Fy(){cout<<"Fy"<<endl;}
};
extern "C" __declspec(dllexport) IUnknown* __cdecl CreateInstance();
(3) 编写组件类的实现文件
//将以下代码保存成 CA.cpp
//3.1编译 IXIYIZ_i.c,编译命令:
//cl /c IXIYIZ_i.c 生成 IXIYIZ_i.obj 文件
//3.2编译 CA.h 文件,编译命令:
//cl /c /GX CA.cpp 生成 CA.obj 文件
//3.3链接上面两个文件,生成组件DLL,编译命令:
//link /dll CA.obj IXIYIZ_i.obj 生成 CA.lib 和 CA.dll
//3.4将 IXIYIZ_i.obj 整合到 CA.lib 文件中,命令:
// lib CA.lib IXIYIZ_i.obj
#include"CA.h"
HRESULT __stdcall CA::QueryInterface(const IID& iid, void ** ppv)
{
if(iid == IID_IUnknown)
{
cout<<"QueryInterface:Return pointer to IUnknown."<<endl;
*ppv = static_cast<IX *>(this);
}
else if(iid == IID_IX)
{
cout<<"QueryInterface:Return pointer to IX."<<endl;
*ppv = static_cast<IX *>(this);
}
else if(iid == IID_IY)
{
cout<<"QueryInterface:Return pointer to IY."<<endl;
*ppv = static_cast<IY *>(this);
}
else
{
cout<<"QueryInterface:Interface not supported."<<endl;
*ppv = NULL;
return E_NOINTERFACE;
}
reinterpret_cast<IUnknown*>(*ppv)->AddRef();
return S_OK;
}
extern "C" __declspec(dllexport) IUnknown* __cdecl CreateInstance()
{
IUnknown *pI = static_cast<IX*>(new CA);
pI->AddRef();
return pI;
}
(4) 编写客户端,对(3)生成的组件(CA.dll)进行测试
//将以下代码保存成 client.cpp 文件
//4.1编译客户端,编译命令:
//cl /c /GX client.cpp 生成 client.obj 文件
//4.2链接客户端与组件,命令:
//link client.obj CA.lib
#include<iostream>
#include<unknwn.h>
#include"IXIYIZ.h"
using namespace std;
extern "C" __declspec(dllexport) IUnknown* __cdecl CreateInstance();
int main()
{
HRESULT hr;
cout<<"Client: Get an IUnknown pointer."<<endl;
IUnknown* pI = CreateInstance();
cout<<"Client: Get Interface IX."<<endl;
IX *pIX = NULL;
hr = pI->QueryInterface(IID_IX, reinterpret_cast<void **>(&pIX));
if(SUCCEEDED(hr))
{
cout<<"Client: Succeeded getting IX."<<endl;
pIX->Fx();
}
return 0;
}
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版权声明:本文为CSDN博主「a-ray-of-sunshine」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/a_ray_of_sunshine/article/details/12683699