Honestly, the best way is to not do forms programming in C++. Use C# to
build a user interface for your core functionality implemented in C++/CLI.
If you really want to rename a form, you need to rename all of the bits
individually - the .h file, the .cpp file (if there is one), the class
declaration, any typedefs or other uses of the class name, and I think there
are 1 or two designer-generated literal strings containing the form name as
well.