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Hi, I have a demo version of DVBViewer Pro v 6.0.4. My C++ code for a COM interface is: #include "stdafx.h" #include <windows.h> #include <objbase.h> #include <comutil.h> #include <stdio.h> #include <time.h> #include <locale.h> #include "initguid.h" int _tmain(int argc, _TCHAR* argv[]) { HRESULT hr; VARIANT varRetVal; DISPID dispID; hr = CoInitialize( NULL ); if ( FAILED( hr ) ) { MessageBox( NULL, TEXT("CoInitialize"), TEXT("ERROR"), MB_OK ); return 2; } // Translate server ProgID into a CLSID. ClsidFromProgID // gets this information from the registry. // CLSID clsid; CLSIDFromProgID( L"DVBViewerServer.DVBViewer", & clsid ); IUnknown * pIUnknown; hr = GetActiveObject( clsid, NULL, & pIUnknown ); if ( FAILED( hr ) ) { MessageBox( NULL, TEXT("GetActiveObject"), TEXT("ERROR"), MB_OK ); return 2; } return 0; } I am getting the error message box: MessageBox( TEXT("GetActiveObject"), TEXT("ERROR"), MB_OK ); Can't figure out what's the problem :-( Anyone? Thanks in advance, Adi