Add Desktop Icon To Taskbar Here

You want a single button on the taskbar that instantly minimizes all open windows so you can see your desktop background or files.

If you want a more visible button (Windows 10 only): add desktop icon to taskbar

The Recycle Bin is a virtual folder (CLSID 645FF040-5081-101B-9F08-00AA002F954E ) with no executable target. Windows Taskbar pinning requires a file system path or registered app ID. You want a single button on the taskbar