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How does the Visual Basic Upgrade Companion handle Windows API calls?

April 26, 2017API companion upgrade visual basic Windows

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How does the Visual Basic Upgrade Companion handle Windows API calls?

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The Visual Basic Upgrade Companion uses two approaches to deal with API functions/types. The first method consists in leaving the code as it comes from VB6, and API functions will still be used in the converted code. Manual effort is required as certain Marshalling tasks could be necessary to pass managed data structures to the unmanaged code (API methods). However, the Visual Basic Upgrade Companion provides a second approach where the final objective is to replace API members with .NET framework native functionality. Currently, the tool converts a subset of API members to .NET equivalents, but it can be extended by adding custom mappings for new API members.