Jürgen, it struck me that it was really lazy of me to not provide you with genuine tooltips as well as the ability to print out a more verbose method at the bottom of the screen. So, I've just committed a patch to FormBase that gives us just that. These tooltips will work with either xforms 0.88 or 0.89 (they being essentially a cut and paste job of code in Toolbar_pimpl).
Activate with setTooltipHandler(ob); and provide a method string const getTooltip(FL_OBJECT *) const; to provide the tip. Attached is your TeXInfo patch modified appropriately. Now we can really have an argument about tooltips vs extended descriptions! Regards, Angus
texinfo.diff.gz
Description: GNU Zip compressed data