Also, actually, the snip shown in the first post of 'show desktop' on the right is just to show that 'show desktop' icon could be created from .scf yet unable to drag into the quicklaunch area.
furthermore , trying both
Show Desktop Icon on Taskbar - Windows 7 Forums
Switch Between Windows - Flip 3D Shortcut
able to create shortcut ( thank you for the links ) yet unable to drag into quicklaunch bar as well.
(Although, it is able to pin the shortcut on the taskbar ;however, I would prefer to use the quicklaunch bar and also need to add 7 stack application to the quicklaunch area as pinning the application on the taskbar confuse me whether the application is still running and i would not like to check every pinned menu or unpinned every applications everytime before shutting down the system.
Are there any approach to make icons or shortcut draggable to the quicklaunch area , please ?