After such a conversion, you'll have to considerably modify your tests. TestComplete uses different wrappers to work with objects in VB and .NET applications: VBObject for VB and WinFormsObject for .NET. Plus, you'll probably need to use different approaches to work with some controls in the .NET version of your application. If you use any native properties and methods to work with controls in the VB version of your AUT, be ready to start using different ones in the .NET version.
-- Dmitry Nikolaev
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