DLL调用CoCreateInstance返回E_NOINTERFACE求解

[cppzhentan]

说说这个小工程吧,它是一个SPI的DLL,在WSAStartup中创建COM对象.相关代码如下:

int WSPAPI WSPStartup(
    IN WORD  wVersionRequested, 
    OUT LPWSPDATA  lpWSPData, 
    IN LPWSAPROTOCOL_INFO  lpProtocolInfo, 
    IN WSPUPCALLTABLE  UpcallTable, 
    OUT LPWSPPROC_TABLE  lpProcTable 
    )
{
    int ret = WSAEPROVIDERFAILEDINIT;

    MessageBox(NULL, _T("TEST"), _T("DBG"), MB_OK);

    CoInitialize(NULL);

    IClassFactory *pCF=NULL;
    HRESULT hr=::CoGetClassObject(
        CLSID_IWzdSrv,		// name of dll to load
        CLSCTX_INPROC_SERVER,// use dll
        NULL,				// for DCOM, a COSERVERINFO structure that id's the remote server
        // more typically set using OLEView
        IID_IClassFactory,	// the class factory interface (all COM DLL/EXE's must have this interface)
        (LPVOID*)&pCF); 

    IUnknown* iWzd = NULL;
    hr = pCF->CreateInstance(
        NULL,				// aggregated COM object (none)
        IID_IWzd,			// class to create and object of
        (LPVOID*) &iWzd);	// returned object pointer

................

    return ret;
}

pCF->CreateInstance调用后,iWzd是NULL,hr的值是E_NOINTERFACE

COM已经注册,并且写了一个测试的EXE能够CreateInstance出iWzd对象...为什么在LSP中就不行了呢,求解释

那么要怎样的方法才能够让它创建成功呢?

备注:
该问题衔接:http://topic.csdn.net/u/20111005/16/d353c25a-b269-4ecb-8a6b-c1af2341d7f1.html
已经是两个帖子了,这个问题很急,两个帖子总共是400分,如果谁能够帮助我,这400分就是他的,谢谢大伙了.

[cppzhentan]

自己顶一下

[二星马甲]

晕，又开了一贴啊。。。看那个帖子

[oyljerry]

^_^，解决问题了就好.

[cppzhentan]

请oyljerry
(【勇敢的心】→ ㊣提拉米苏√㊣)
进来,结贴了...

[justlovetao]

好想拿分啊。。。可是能力有限啊 LZ 好运啊

[cppzhentan]

呼叫oyljerry
(【勇敢的心】→ ㊣提拉米苏√㊣)