oh shit dude, and you trusted them? You already dun fucked up.
I just made a POS boring as hell business app for family*. I slapped a gui over a simple console application because ohbytheway while you're working on it we want the user to be able to redefine the sorting ruleset at runtime.
It has labels, text entry boxes, and comboboxes, and to pack it I used vboxes, hboxes, and tables.
Here's the libraries I needed:
Yes... yes... I developed a windows program with the GTK. Shut up.
*NEVER get roped into working for family by the way.