Wow, what a fun idea! WIll definitely be buying this. One question - would this allow you to render things above the wallpaper but below everything else, eg icons and windows?
Viewing post in Invisible Window - GameMaker comments
Hello, I'm very happy that you're interested in the plugin. From what I understand, you're asking if it's possible to make an object from my game appear behind an icon on the desktop. If that's the case, I believe it wouldn't be possible, as you would need to detect the icons on the user's desktop, and as far as I know, this isn't feasible with GameMaker. You would probably need to implement another plugin or develop it using a different platform