Zyclic updating of toplevel windows

[Michael Willenpart]

Hi!
I've written a small program which mainly consists of a simple options 
window. Within this window it's possible to select a time interval and 
the type of an report. Depending of this time interval 2 log files were 
parsed and a summary of these files is provided as a line and a bar 
diagram in a separate window (using the toplevel function).
If the user generates 3 reports, 3 graphic windows were displayed on the 
screen.

Now my question:
Is is somehow possible to auto-update the toplevel-windows? e.g. to 
redraw the diagrams every 10 minutes.

Thanks,
	Michael