This may just be a terminology issue for me... My next task on our game is to make a screen where the player can see some information on units and do some manipulation if he wants. The various information should be grouped an arranged in an easy-to-understand and clear method. And that method will need a style which fits the game and isn't hard to read.
Now, I'm thinking there has to be library out there already for this kind of stuff. It can't be as inflexible as making a separate png or jpg for each and every sub-window on the screen. Certainly there's a way to say this style(like a font), rectangle, in this dimensions. It's possibly simple, but even if it's not it is certainly frequently necessary. So I google for...GUI's? I'm not sure that's right, because when I do I get ugly office stuff like this (not.jpg), and not things like (yes1.jpg)(yes2.jpg).