VIProductVersion and GetDllVersionLocal

Does VIProductVersion work with GetDllVersionLocal? (I guess "no").

Same question:
VIAddVersionKey /LANG=${LANG_ENGLISH} FileVersion "..."

I want to let the installer get the same VersionNumber as my main executable has.

It's a compile-time setting, you'll have to use a defined symbol or write a batch file using an external application.