I have also to cope with Tkx because of updating to AS perl 5.12, which has no Tk but Tkx (I read Tk will not even compile with 5.12 due to 3 critical bugs, but I did not tryout myself). So I tried to migrate a simple GUI with some frames and OpenFile to Tkx and it was nearly the same like in Tk, only the function names have changed. Checkout http://docs.activestate.com/activeperl/5.8/lib/Tkx/Tutorial.html, the examples helped me a lot.