How are Visual Basic 6.0 Routines upgraded?
Parameters can be passed to a procedure or function in one of two ways: by reference (ByRef) or by value (ByVal). When a parameter is passed to a subprocedure by reference, changes made to the parameter’s value affect the actual variable or object passed by the calling procedure. When a parameter is passed by value, the subprocedure uses a copy of the original variable or object, and any changes the subprocedure makes to it do not affect the original. By default, Visual Basic 6.0 uses the ByRef method when the parameter’s data type is an intrinsic one such as Integer, Long, Boolean, String, and so on. When a parameter uses a non-intrinsic data type, Visual Basic 6.0 passes it by value by default. By comparison, Visual Basic .NET passes all parameters by value unless otherwise specified. If a parameter keyword is specified in the signature a Visual Basic 6.0 routine, the upgrade wizard will generate the Visual Basic .NET routine accordingly. If ByVal or ByRef are not specified for a par
