How are Visual Basic 6.0 fixed-length strings upgraded to VB .NET?
Visual Basic 6.0 has a fixed-length string data type that is not supported in Visual Basic .NET. Any fixed-length string declarations in your code must be upgraded to a fixed-length string wrapper class that is provided in Visual Basic .NET. The Upgrade Wizard produces code that has a dependency on the Visual Basic 6.0 compatibility runtime. To avoid this, you must prepare your code prior to the upgrade or change the resulting Visual Basic .NET code.