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c++中使用com的方法

簡單模擬：

#include? " ClassDll.h "

#include? " ClassDll_i.c "

if ?(?FAILED(?CoInitialize(NULL)?))

{

return ;

}

IClass * ?pIClass;

hr? = ?CoCreateInstance(CLSID_Class,

NULL,

CLSCTX_INPROC_SERVER,

IID_IClass,

( void ** )? & pIClass);

if ?(?SUCCEEDED(hr)?)

{

// hr?=?pIClass->Method();

if ?(?SUCCEEDED(hr)?)

{

}

else

{

}

pIClass -> Release();

}

CoUninitialize();

具體實例：
LOCAL COM Server:

import? " oaidl.idl " ;

// ?define?IStats?interface

[ object ,?uuid(FE78387F - D150 - 4089 - 832C - BBF02402C872),

?oleautomation,?helpstring( " Get?the?status?information?about?this?car " )]

interface ?IStats?:?IUnknown

{

???HRESULT?DisplayStats();

???HRESULT?GetPetName([ out ,retval]?BSTR * ?petName);

} ;

// ?define?the?IEngine?interface

[ object ,?uuid(E27972D8 - 717F - 4516 - A82D - B688DC70170C),

?oleautomation,?helpstring( " Rev?your?car?and?slow?it?down " )]

interface ?IEngine?:?IUnknown

{

???HRESULT?SpeedUp();

???HRESULT?GetMaxSpeed([ out ,retval]? int * ?maxSpeed);

???HRESULT?GetCurSpeed([ out ,retval]? int * ?curSpeed);

} ;

// ?define?the?ICreateMyCar?interface

[ object ,?uuid(5DD52389 - B1A4 - 4fe7 - B131 - 0F8EF73DD175),

?oleautomation,?helpstring( " This?lets?you?create?a?car?object " )]

interface ?ICreateMyCar?:?IUnknown

{

???HRESULT?SetPetName([ in ]BSTR?petName);

???HRESULT?SetMaxSpeed([ in ]? int ?maxSp);

} ;

// ?library?statement

[uuid(957BF83F - EE5A - 42eb - 8CE5 - 6267011F0EF9),?version( 1.0 ),

?helpstring( " Car?server?with?typeLib " )]

library?CarLocalServerLib

{

???importlib( " stdole32.tlb " );

???[uuid(1D66CBA8 - CCE2 - 4439 - 8596 - 82B47AA44E43)]

???coclass?MyCar

??? {

??????[ default ]? interface ?ICreateMyCar;

?????? interface ?IStats;

?????? interface ?IEngine;

???} ;

} ;

LOCAL COM Client:

#include?"../CarLocalServer/CarLocalServerTypeInfo.h"????//?use?your?own?path?here

#include?"../CarLocalServer/CarLocalServerTypeInfo_i.c"??//?use?your?own?path?here

#include?"iostream.h"

//?for?showing?possible?mistakes

void?ShowErrorMessage(LPCTSTR,HRESULT);

int?main()

{

???//?initialize?the?COM?runtime

???cout?<<?"Initialize?the?COM?runtime

???CoInitialize(NULL);

???cout?<<?"success."?<<?endl;

???//?declare?variables

???HRESULT?hr;

???IClassFactory*?pICF?=?NULL;

???ICreateMyCar*??pICreateMyCar?=?NULL;

???IEngine*???????pIEngine?=?NULL;

???IStats*????????pIStats?=?NULL;

???cout?<<?endl?<<?"Get?the?class?factory?interface?for?the?Car?class

???hr?=?CoGetClassObject(CLSID_MyCar,CLSCTX_LOCAL_SERVER,?

?????????????????????????NULL,IID_IClassFactory,(void**)&pICF);

???if?(?FAILED(hr)?)

???{

??????ShowErrorMessage("CoGetClassObject()",hr);

??????exit(1);

???}

???else?cout?<<?"success."?<<?endl;

???cout?<<?"Create?the?Car?object?and?get?back?the?ICreateMyCar?interface

???hr?=?pICF->CreateInstance(NULL,IID_ICreateMyCar,(void**)&pICreateMyCar);

???if?(?FAILED(hr)?)

???{

??????ShowErrorMessage("CoCreateInstance()",hr);

??????exit(1);

???}

???else?cout?<<?"success."?<<?endl;

???//?set?parameters?on?the?car

???cout?<<?endl?<<?"Set?different?parameters?on?the?car

???pICreateMyCar->SetMaxSpeed(30);

???BSTR?carName?=?SysAllocString(OLESTR("COMCar?!"));

???pICreateMyCar->SetPetName(carName);

???SysFreeString(carName);

???cout?<<?"success."?<<?endl;

???cout?<<?endl?<<?"Query?the?IStats?interface

???pICreateMyCar->QueryInterface(IID_IStats,(void**)&pIStats);

???cout?<<?"success."?<<?endl;

???cout?<<?endl?<<?"Use?the?IStats?interface?to?

????????????????????display?the?status?of?the?car:"?<<?endl;

???pIStats->DisplayStats();

???cout?<<?endl?<<?"Query?the?IEngine?interface

???pICreateMyCar->QueryInterface(IID_IEngine,(void**)&pIEngine);

???cout?<<?"success."?<<?endl;

???cout?<<?endl?<<?"Start?to?use?the?engine

"?<<?endl;

???int?curSp?=?0;

???int?maxSp?=?0;

???pIEngine->GetMaxSpeed(&maxSp);

???do

???{

??????pIEngine->SpeedUp();

??????pIEngine->GetCurSpeed(&curSp);

??????cout?<<?"current?speed?is:?"?<<?curSp?<<?endl;

???}?while?(curSp?<=?maxSp);

???if?(?pICF?)?????????pICF->Release();

???if?(?pICreateMyCar)?pICreateMyCar->Release();

???if?(?pIStats?)??????pIStats->Release();

???if?(?pIEngine?)?????pIEngine->Release();

???cout?<<?endl?<<?"Close?the?COM?runtime

???CoUninitialize();

???cout?<<?"success."?<<?endl;

???return?0;

}

void?ShowErrorMessage(LPCTSTR?header,?HRESULT?hr)

{

???void*?pMsg;

???FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER?|?

?????????????????FORMAT_MESSAGE_FROM_SYSTEM,NULL,hr,

?????????????????MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT),?

?????????????????(LPTSTR)&pMsg,0,NULL);

???cout?<<?header?<<?":?Error("?<<?hex?<<?hr?<<?"):?"?

????????<<?(LPTSTR)pMsg?<<?endl;

???LocalFree(pMsg);

}

參考： http://www.codeproject.com/com/LocalCOMServerClient.asp

posted on 2005-12-24 14:53 夢在天涯閱讀(3183) 評論(0) 編輯收藏引用所屬分類: CPlusPlus 、COM/ATL

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