calling c# from COM

Question

I intend to develop a CCW for a C# class in Visual Studio 6 (C++) according to the instructions I have found in several articles. I have successfully included the C# class in my code , and I can even created the object pointer to the class and been able to compile it. But I am not able to find any of the the functions I have defined and implemented in the C# class. Is there any special attribute you must set before the functions you want to export ? In the examples I saw , at least, there is not .... I would appreciate if somebody can explain what I am doing wrong... ------------------------------------------------------------- #import "..\DummyTData\bin\Debug\TData.tlb" rename_namespace("TDATA") class ATL_NO_VTABLE CComSQLData : public CComObjectRootEx, public CComCoClass, public IDispatchImpl { public: TDATA::_CComSQLDataPtr pTData; CComSQLData() { pTData.CreateInstance("TData.CComSQLData"); pTData->GetData("lkdfj"); <-- this line does not work .... It can't find function in class library } Btw .. C# classlibrary looks like this: namespace TData { interface IComSQLData { void SetData( string Column, string sData); string GetData( string bstrColumn); } public class CComSQLData: IComSQLData { public void SetData(string Column, string sData) { } public string GetData(string Column) { return null; } }