GTK widget which to use?
 

hello,
I want to use a widget that will be text windows and it will have capability to clear its text area. which is that? also how can i redirect output of any terminal command to that text window? say if i clik on button then how can i display output of ls command there in text area widget?

The GtkTextView widget should do what you're looking for. As for the commands, use g_spawn_command_sync (or something like that), which has an option for directing the output to a buffer, IIRC. You can then have the program read the output and write it to the TextView widget.