实在没法再开一贴，很急的啊。求救！！！

xin_zzq1 2009-03-19 03:54:30

问题如下：
我用个线程去执行操作时，第一次能够线程执行成功，但第2次继续执行到：hr = mpIRapiDesktop->EnumDevices(&mpIRapiEnumDevices);hr得到的值是E_INVALIDARG，如果关掉程序重新执行也是只能执行一次。
部分代码如下：



    HRESULT hr = S_OK;

    clearSession();

    addNewInfo(_T("Try to connect a device....."));

    CoInitialize(NULL);

    // Create an instance of the IRAPIDesktop interface.

    hr = CoCreateInstance(CLSID_RAPI,

                        NULL,

                        CLSCTX_INPROC_SERVER,

                        IID_IRAPIDesktop,

                        (void**)&mpIRapiDesktop);



    if (hr ==0 && mpIRapiDesktop)

    {

        addNewInfo(_T("CoCreateInstance success"));

    }else{

        addNewInfo(_T("CoCreateInstance failure"));

        return false;

    }



    // Call EnumDevices to obtain an enumeration of connected devices.

    hr = mpIRapiDesktop->EnumDevices(&mpIRapiEnumDevices);

线程代码：



UINT  CCESyncDlg::ThreadProc(LPVOID param)  //线程函数 

{   

       //数据库的初始化

    DBConnectionFactory* pFactory =NULL;

    try

    {

        pFactory=DBConnectionFactory::getIntance();

        pFactory->initPool();

    }

    catch(DatabaseException e)

    {        

        TRACE(e.what());

    }

    CCESyncDlg* pThread=(CCESyncDlg*)param;

    pThread->SyncFun();//实现部分

    Sleep(1000);

    DBConnectionFactory::releaseInstance();

    AfxEndThread(RetThread);

    return   RetThread;   

}



void CCESyncDlg::OnBnClickedSync()

{

       // TODO: 在此添加控件通知处理程序代码

    ExitCode=0;

    m_iThread=AfxBeginThread(ThreadProc,(LPVOID)this);    

    GetDlgItem(IDC_STOP)->EnableWindow(true);

    return ;



}

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csbinchina 2009-03-20

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xin_zzq1 2009-03-20

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谢谢各位大虾！中午2个贴一起结了

fandh 2009-03-20

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已经发了！

y0355017 2009-03-19

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珍惜生命远离CPP 2009-03-19

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你搜索列集,很多先成的例子

oyljerry 2009-03-19

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[Quote=引用 5 楼 xin_zzq1 的回复:]
我的多线程应该怎么样进行处理
[/Quote]
你是多线程调用这个com接口，需要做列集等，做marshal



#include "stdafx.h"

#include "crtdbg.h"

#include "windows.h"



#pragma comment(lib, "ole32.lib")



LPSTREAM g_pMarshaledInterfaceStream;



DWORD WINAPI ClientThreadProc(LPVOID lpParam)

{

    HRESULT hr;

    LPUNKNOWN pUnk;



    ::OleInitialize( 0 );



    // unmarshal interface to create proxy/stub pair

    hr = ::CoUnmarshalInterface(g_pMarshaledInterfaceStream, IID_IUnknown, (void**)&pUnk);

    _ASSERTE( SUCCEEDED(hr) );

    //

    // use this interface proxy to manipulate the word document

    //

    LPOLEOBJECT pOleObject;

    hr = pUnk->QueryInterface(IID_IOleObject, (void**)&pOleObject);

    _ASSERTE( SUCCEEDED(hr) );



    // release interface after use

    pOleObject->Release();

    pUnk->Release();



    ::OleUninitialize();



    return 0;

}



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

{

    // get word document CLSID

    CLSID clsidWord;

    ::CLSIDFromProgID(OLESTR("Word.Document"), &clsidWord);



    ::OleInitialize( 0 );



    HRESULT hr;



    // start winword server

    LPUNKNOWN pUnk;

    hr = ::CoCreateInstance(clsidWord, NULL, CLSCTX_LOCAL_SERVER, IID_IUnknown, (void**)&pUnk);

    if( SUCCEEDED(hr) )

    {

        // marshal interface between threads

        hr = ::CoMarshalInterThreadInterfaceInStream(IID_IUnknown, pUnk, &g_pMarshaledInterfaceStream);

        _ASSERTE( SUCCEEDED(hr) );



        // create a client thread;

        // we don't need the CRT runtime, so use CreateThread() directly

        HANDLE hClientThread;

        hClientThread = ::CreateThread(NULL, 0, ClientThreadProc, NULL, 0, NULL);

        // wait client thread to end

        ::WaitForSingleObject(hClientThread, INFINITE);



        // release resources

        pUnk->Release();

        g_pMarshaledInterfaceStream->Release();

    }



    ::OleUninitialize();



    return 0;

}