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Building, Versioning, and Maintaining Visual Basic
http://msdn.microsoft.com/library/en-us/dnvb600/html/msdn_bldvbcom.asp
This articles the issues that need to be considered while designing COM components using Visual Basic. (Ivo Salmre / Microsoft Corporation)
Understanding Interface-based Programming
http://msdn.microsoft.com/library/en-us/dnvb600/html/ifacebased.asp
It provides Visual Basic programmers with an understanding of interface-based programming. (19 printed pages) Covers (Ted Pattison / Microsoft Corporation)