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. |
