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Subject: Re: [VC++] QueryService IID_I3DViewService4 issue Sender: nalex@parallelgraphics.com 27.06.07 04:37 [...] If I understand you correctly, QueryInterface for IID_IServiceProvider succeeds but method returns NULL instead of valid interface pointer? Exactly. This call pEngine->QueryInterface(IID_IServiceProvider, reinterpret_cast<void**>(&servprov)) always returns NULL instead of the expected pointer. What is HRESULT? Is it S_OK or E_NOINTERFACE? Are you calling GetEngine() and QueryInterface on the same thread as you created Cortona ActiveX control?   [reply] [back to forum] [new message] [all forums] [VC++] QueryService IID_I3DViewService4 issue / Andrea B / 26.06.07 12:35      Re: [VC++] QueryService IID_I3DViewService4 issue / nalex@parallelgraphics.com / 26.06.07 18:32          Re: [VC++] QueryService IID_I3DViewService4 issue / Andrea B / 27.06.07 03:42              Re: [VC++] QueryService IID_I3DViewService4 issue / nalex@parallelgraphics.com / 27.06.07 04:37                  Re: [VC++] QueryService IID_I3DViewService4 issue / Andrea B / 27.06.07 05:00                      Re: [VC++] QueryService IID_I3DViewService4 issue / nalex@parallelgraphics.com / 27.06.07 06:34 Messages in thread: 6 [reply] [back to forum] [new message] [all forums]