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Creating Gnome Panel Applet

Hello all!

I need to be pointed in the right direction on how to do this project.

I simply want a gnome panel applet that will run constantly and, when clicked, will display an IM style list of I.P. addresses that are active on the network I am currently connected to. It should be able to have a configuration menu that will allow the user to specify a subnet mask, and frequency of scan.

I am looking for something that will return something similar to the output of:

Code:

nmap -sP xxx.xxx.xxx.xxx-xxx

My question is: What language should I learn to make this happen, and is anyone willing to mentor me through the process?

Thanks!

For the programming language, probably C or C++, plus the GTK library. For the mentor:

http://en.wikiversity.org/wiki/C%2B%2B

http://en.wikibooks.org/wiki/GTK%2B_By_Example