For those of you that have been waiting with baited breath for an answer here (ha!):
I'm still working on web dynpro enhancements, but for report/FM/class based enhancements, you can find what you need in table:
ENHINCINX
Field ENHINCLUDE has an include name that can be read at runtime using the READ REPORT command.
I'll update again if I can find web dynpro enhancements.