Desktop widget anchored on right

[myspacee]

Hello,
try to build a widget with some tools inside. I want that this GUI is anchored on the right and have as first tool a drag&drop area.

I imagine something like this, without trasparencies and other things  :

replacing clock with a drag&drop area. (exist AI function to enable drag&drop for multiple files ? )

 

thank you fro any examples,

m.