You’re right. Objo currently has the receiving half of drag and drop through the DragEnter, DragOver, DragExit, and Drop events, but it cannot initiate a drag from application code.
I think this is a useful desktop feature, so I’ve accepted it for future implementation: https://feedback.objo.dev/feature/1212
The initial design will add a small DragItem class for dragging text and application-defined string data from any control. The existing DragData class will remain the receiving side.
I don’t plan to reproduce every part of Xojo’s DragItem immediately. Platform-specific raw data, promised files, multiple items, drag pictures, and similar advanced features can be considered later if there are concrete use cases.