If you would bother to use Google for 30 seconds you could have found this: The DSOFramer control is for demo purpose, we did not provide support for it. NOTE: This sample is provided "AS IS" with no warranty or support from Microsoft. It is a demonstration, provided for informational purposes only, and has not been rigorously tested with all environments and ActiveX document servers. It is up to you to make it "production ready" if you use it in any development solution. Visual C++ ActiveX Control for hosting Office documents in Visual Basic or HTML http://support.microsoft.com/Default.aspx?id=311765 If you still have any concern, please feel free to post here.