Oh, ok. If it was done with a for loop and an array for each column, with
, then it would have been clear from the start.
Anyway, thanks for the help so far. I'll look into tablelist and Tcl/Tk when I'm a bit less busy in a few days' time and come back with questions if you don't mind. The author of tablelist appears to be a Hungarian like myself, so maybe I'll pester him if I can find contact info.