Hi Elang,

I'm also learning to create addons. It's lots of fun, even though it's slow. I've found that the best resource is all the commands that already exist. Especially whichever one is closest to what you want to do. Sounds like you already figured out that part. I put together a folder of as many commands as I could find and then whenever I have a question about something I can search for it in these files and see how other people handled it. I'm on Mac so I use BBedit's multi-file search for this purpose, but I think Notepad++ "Find in Files" can be used on Windows. The places that I've found troves of commands are:

• Burr's script archive and Petr's MoI page
• Pilou's website
• the commands built into MoI which are already on your computer

A download manager like wget can be used to get just the .js, .htm, and .zip files from these websites.

Some specifics including an example of how to set up a UI are in the html file here: http://moi3d.com/forum/index.php?webtag=MOI&msg=10857.36