How to create DesktopX Objects: https://www.stardock.com/products/desktopx/Docs/22/DevelopersGuide.htm (38 pages)

Writing Scripts for DesktopX Objects: https://www.stardock.com/products/desktopx/Docs/22/ScriptingGuide.htm (38 pages)

And if you get stuck, just write here and we'll try to help you.