XTREE supports three different drag-and-drop scenarios:

•   Drag and drop within a single tree, for item re-ordering. XTF_DRAGDROP.

•   Drag and drop of items between two XTREE controls. See XTF2_FILEDROP.

•   Dragging a file from an Explorer or Windows Shell dialog and dropping it on an XTREE control. See XTF2_FILEDROP.