Programming textboxes etc in the x server window

Hi all,

I'm new to Linux and programming in c++.
I have basic tutorials on programming and using X windows.

What I need is a tutorial on programming textbox, combobox etc. controls within the window.
I have no idea where to start.
I have all the other info I need to get started on my pet project and I'm keen to start.

Any info would be greatly appreciated.

Thanks,
BeerGut.

Since writing the post above I have found a tutorial on the GTK+ toolkit.
Seems I've answered my own post.

Thanks to all that read it anyway.

BeerGut.