DesktopWindow.DropObject
From Xojo Documentation
Event
DesktopWindow.DropObject(Obj as DragItem, Action as DragItem.Types)
New in 2021r3
Supported for all project types and targets.
New in 2021r3
Supported for all project types and targets.
The item represented by Obj has been dropped on the window.
Notes
The Action parameter specifies the type of drag action (default, copy, move or link).