Starts a drag-and-drop operation. When the mouse is over a legal drop spot, the cursor will change into the drop cursor, allowing you to drop the text to a new location. At the completion of a drag-and-drop operation, the text will be deleted from the current location, and pasted to the dropped location. If there is no primary selection, this command has no effect.
By default this command is executed by left-clicking and dragging from within the current primary selection. If the control key is pressed during any point during a drag-and-drop operation, the operation will turn into a drag-and-drop-add operation.
Warning: This command must be followed by a SelectionDrop. See the SelectionDrop and SelectionStartDragAdd.