I didn't know about that but when I tried it I didn't get the same dialog - the option to implement virtual methods is missing.
I'm on the latest version of va_x :-
License: [email protected] (4-user license) Support ends 2015.09.12 VA_X.dll file version 10.9.2068.0 built 2015.06.09 DevEnv.exe version 12.0.31101.0 Ultimate msenv.dll version 12.0.31101.0 Comctl32.dll version 6.10.7601.18837 Windows 7 6.1 Build 7601 Service Pack 1 8 processors (x86-64, WOW64) Language info: 1252, 0x809