I'm working in Delphi 10 Seattle and I have Virtual Treeview version 7.2.1 installed. It's been some years since I needed to drag and drop in a treeview.
I created handlers for OnDragOver and OnDragDrop. DragType is dtOLE. DragMode is dmAutomatic.
The problem is that the compiler gives me an error "E2005: IDataObject is not a type identifier."
And it isn't defined in VirtualTrees.pas.
What do I do to define IDataObject?
How do I define IDataObject for VirtualTreeview drag and drop?
280 views Asked by J. Tred At
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