Class Not Registered in MFC dll

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Hello!
I am working on MFC dialogue based application,for that I used Dll functionality in COM. DLL is build successfully. I register it with registry editor by using GUID for the interfaces in dll application.I wrote below code for Initialise com object,but it gives error that "Class Not Registered.I also copy the code of my .reg file.
//////////////Dialogue based application code////////////////////

XML

ISum *pISum=NULL;
<pre lang="cs">HRESULT hr=CoInitialize(NULL);
    if(FAILED(hr))
    {
        AfxMessageBox(L&quot;Com Library cannot initialized&quot;,MB_ICONERROR);
        return FALSE;
    }
    hr=CoCreateInstance(CLSID_SumSubtract,NULL,CLSCTX_INPROC_SERVER,IID_ISum,(void **)&amp;pISum);
    if(FAILED(hr))
    {
        AfxMessageBox(L&quot;ISeum Interface cannot be obtained&quot;,MB_ICONERROR);
        return FALSE;
    }</pre>

////////.Reg file code////////////////

C#

REGEDIT4
[HKEY_CLASSES_ROOT\CLSID\{996BA870-10DF-44f3-81C1-3C9332ADFE35}]
@="ClassFactoryMFC"
[HKEY_CLASSES_ROOT\CLSID\{996BA870-10DF-44f3-81C1-3C9332ADFE35}\InProcServer32]
@=C:\\Windows\\System32\\ClassFactoryMFC.dll"

Please give me solution!!!

Posted 3-May-13 3:51am

Venkat Raghvan

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Richard MacCutchan · Answer 1 · 2013-05-03T04:42:00

Solution 1

You should use Regsvr32[^] to register COM libraries properly.

Posted 3-May-13 4:42am

Richard MacCutchan

Comments

Venkat Raghvan 3-May-13 10:47am

I tried to register Com library but it gives me error that "the entry point DllRegisterServer was not found

Richard MacCutchan 3-May-13 10:56am

Then you need to add the registration code to your DLL and register all your interfaces properly, as described in the MSDN documentation.