how to set a callback function to an icon in an entry ?

[Nicolas Jäger <jagernicolas legtux org>]

Hi,

I would like to use the second icon of the entry to erase the text in
the entry, I'm looking for the function to connect a callback function
when I click on the icon.

regards,

/nicoo

TO MODERATORS : I sent a first mail with a screenshot, forget it. In
the future I will upload somewhere on internet my screenshot instead of
joining them.