Widget to pick timezone

["fiandro tiscali it" <fiandro tiscali it>]

Hi

I'm looking for a widget that allows the user to pick a capital city 
from a world map of countries, so that he can set he timezone he is in; 
the app i need it for is written in pure C language (no C++ noe GLADE).
Browsing the Gnome CVS repo, i found the e-timezone-dialog widget [1]: 
is this a good starting point for my application or there are also 
other alternatives that would do better?

thanks a lot

Attilio

[1] http://cvs.gnome.org/viewcvs/evolution/widgets/e-timezone-dialog/



                
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