In order to apply many of the transformation rules that take place during the translation process, a symbol resolution mechanism is imperative. This mechanism allows the migration tool to find out the following information:
Each expression’s data type.
Referenced library elements.
Implicit default properties which are tacitly referenced and should be explicit in .NET
Type coercions which should be generated in the target language
The corresponding library element in .NET for each element in VB6
Parameters declared as by-ref, out or optional which require special translations
Etc.
These symbol dictionaries have been strongly improved by adding the typing mechanism, a feature that allows resolving the most appropriate type for an undeclared series of elements, or that were declared as an abstract high-level type like Variant, Control or Form. See “Typing Mechanism” section below.
