Hello Robert,
you may try to look at BalloonTip. It's been a while since I have updated the source code, but I see that it still works on wxPython 2.6.3.2 (I am on Windows XP). You can find the code here:
http://xoomer.virgilio.it/infinity77/eng/freeware.html#balloontip
Or:
http://sigmacore.net/andrea/?page_id=2
IIRC, it should work also with the toolbar, at least on Windows (I have never tried on other platforms).
Andrea.
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_________________________________________
Andrea Gavana (gavana@kpo.kz)
Reservoir Engineer
KPDL
4, Millbank
SW1P 3JA London
Direct Tel: +44 (0) 20 717 08936
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