Question

以下是在OLE自动化的后台运行Ms Word的代码：

int _tmain(int argc, _TCHAR* argv[])
{
    CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
    CLSID clsid;
    HRESULT hr = CLSIDFromProgID(L"Word.Application", &clsid);

    IDispatch *pWApp;
    if(SUCCEEDED(hr))
    {
         //here the process starts
         hr = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER,
                               IID_IDispatch, (void **)&pWApp);

         cout << "success" << endl;
    }

    //here I try to end it
    pWApp->Release();
    CoUninitialize();
    return 0;
}

不幸的是，在我的程序结束后，Word仍然在内存中。怎么阻止它？

Answer 1

您正在创建的Word.Application对象有一个Quit()方法，您可以选择在Release()指向对象的接口指针之前调用该方法：

退出Microsoft Word并选择保存或路由打开的文档。

由于您拥有对象的IDispatch界面，因此您可以使用IDispatch::GetIDsOfNames()和IDispatch::Invoke()方法调用Word.Application.Quit()方法，例如：

int _tmain(int argc, _TCHAR* argv[])
{
    HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
    if (SUCCEEDED(hr))
    {
        CLSID clsid;
        hr = CLSIDFromProgID(L"Word.Application", &clsid);
        if (SUCCEEDED(hr))
        {
            IDispatch *pWApp;
            hr = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER, IID_IDispatch, (void **)&pWApp);
            if (SUCCEEDED(hr))
            {
                cout << "success" << endl;

                // use pWApp as needed ...

                DISPID dispID;
                LPOLESTR ptName = L"Quit"; //name of the method
                hr = pWApp->GetIDsOfNames(IID_NULL, &ptName, 1, LOCALE_USER_DEFAULT, &dispID);
                if (SUCCEEDED(hr))
                {
                    //no parameters
                    DISPPARAMS dp = {NULL, NULL, 0, 0};
                    hr = pWApp->Invoke(dispID, IID_NULL, LOCALE_SYSTEM_DEFAULT, DISPATCH_METHOD, &dp, NULL, NULL, NULL);
                }

                pWApp->Release();
            }
        }

        CoUninitialize();
    }

    return 0;
}

如何结束COM自动化期间执行的过程

1 个答案: