IUP is great, but there is very little tutorial information. You have to learn from the reference and source examples. For LED, just look at the listings alongs

IUP is great, but there is very little tutorial information. You have to learn from the reference and source examples. For LED, just look at the listings alongside the C and Lua. It's a simple language to figure out. Although LED allows GUI modification without recompilation, it seems hardly anyone uses it. IUP is so well designed that GUIs in Lua or C are quite simple to hand code. A C version will be more verbose than Lua, but if I'm writing a logic in C, I find it more convenient to stick with C for the GUI.