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.NET Forum / .NET Framework / Interop / May 2006Difference between "Make Assembly COM-Visible" and "Register for COM Interop"?
I'm developing a .NET class library. I want this to be callable by VB6 (COM / ActiveX) clients. In Project Properties, under Application | Assembly Information, I see an option titled "Make Assembly COM-Visible". How does this differ from "Register for COM Interop" in the Output section of the Build tab? Thanks for your advice! - Joe Geretz - I think Make Assembly COM Visible will create ComVisible line in the AssemblyInfo file. Register for COM Interop will actually run Regasm after every build to register the types with COM (which you probably shouldn't do until you're stable because your COM Guids will change whenever you change the methods unless you specify Guids explicitly, so your registry could end up with a lot of registration junk for versions that will never be used).  SignaturePhil Wilson [MVP Windows Installer] ---- > I'm developing a .NET class library. I want this to be callable by VB6 > (COM / ActiveX) clients. In Project Properties, under Application | [quoted text clipped - 5 lines] > > - Joe Geretz - > every build to register the types with COM (which you probably shouldn't > do until you're stable because your COM Guids will change whenever you > change the methods unless you specify Guids explicitly, so your registry > could end up with a lot of registration junk for versions that will never > be used). That's true. To just let you my first experience with COM-Interops, I ended up having 14 junk GUIDs in CLSID. I had to manually clean the registry. Well, I got away without destablizing the OS. :)) SignatureHappy Hacking, Gaurav Vaish http://www.mastergaurav.org http://webservices.edujini.in -------------------
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