CoCreateinstance returns error while trying to use c# class from C++ code

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I am trying to use c# assembly from my c++ code. For this i have followed these steps.

In AssemblyInfo.cs i have set the attribute ComVisible=true.
After building C# assembly, i have generated type library using following command

RegAsm DLLNAME.dll /tlb

I have imported the generated file in my C++ program.

In my TestApplication everything works fine. But when i try to move this c++ code to my MMC (Microsoft management console) dll, CoCreateInstance fails with the error code REGDB_E_CLASSNOTREG.

Why it is so, what is special about C++ dll for MMC ??

Posted 5-Sep-13 7:51am

PrafullaVedante

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[no name] 5-Sep-13 14:02pm

Did you register the COM component in the registry before trying to use it?

Philippe Mori 5-Sep-13 18:49pm

Maybe that can help you: How-To Create a Hello World Snap-in

KarstenK 6-Sep-13 3:56am

If you working with COM you NEED pay attention ot EVERY ERRORCODE. => your class isnt properly registered. So you cant create an instance.

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Lakamraju Raghuram · Answer 1 · 2013-09-19T01:39:00

Solution 1

Try to register by /codebase option
RegAsm DLLNAME.dll /codebase

Posted 19-Sep-13 1:39am

Lakamraju Raghuram