(wxPython) icon on panel

[Jimmy]

hi,all!
have you used 'dictionary' of linux, the program that rests on the
panel as an icon, and when you click on the icon, it will display a
window and do something. So i'm wondering how to achieve this. I guess
it's a dialog window, right? but the crucial part is how to minimize
the program to an icon on the panel and make it responsive to the
click event.
thanks in advance!