updating VB6 project using OCX components

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Have been working with VB6 for 10+ years and now must convert some programs to .Net.

Can I use my existing OCX components or must I re-design my entire user interface?

I know there is a "Code Advisor" that will scan my code and suggest ways to use inline code with .NET but concern is calls to Window API as well as other DLL's and OCX components.

Any insight would be appreciated.

Thanks,

Lee