Hi Dritt
Personally I'd recommend the BlueGui DLL as once you know how to use it its very versatile.
The default Gui Editor that comes with it, (Rainbow), is not that good, but i have a VisualBasic Style editor for it which i'me currently doing.
http://forum.thegamecreators.com/xt/xt_apollo_pic.php?i=1410609
This image, (linked above), is the Editor i've made which will hopfully be coming out in the coming months, it was fully made on DarkBasic using the BlueGui DLL, so it should give you an idea of the things you can do in DarkBasic with Practice
Everyone Be Cool, You, Be Cool.