By default, the AutoDrag property is exAutoDragNone(0). The AutoDrag feature indicates what the control does when the user clicks an item and starts dragging it. For instance, using the AutoDrag feature you can automatically lets the user to drag and drop the data to OLE compliant applications like Microsoft Word, Excel and so on. The SingleSel property specifies whether the control supports single or multiple selection. The AutoDrag feature adds automatically Drag and Drop, but you can still use the OLEDropMode property to handle the OLE Drag and Drop event for your custom action. The control fires the AllowAutoDrag event, when the AutoDrag property is exAutoDragPosition. 

The drag and drop operation starts:

• once the user clicks and moves the cursor up or down, if the SingleSel property is True.
• once the user clicks, and waits for a short period of time,  if SingleSel property is False ( multiple items in selection is allowed ). In this case, you can drag and drop any item that is not selected, or a contiguously selection

Once the drag and drop operation starts the mouse pointer is changed to MOVE cursor if the operation is possible, else if the Drag and Drop operation fails or if it is not possible, the mouse pointer is changed to NO cursor.

If using the AutoDrag property on:

• exAutoDragPosition

the Drag and Drop starts only:

• item from cursor is a selectable ( SelectableItem property on True, default ) and sortable item ( SortableItem property on True, default ). 
• if multiple items are selected, the selection is contiguously.

Use the AutoDrag property to allow Drag and Drop operations like follows:

• Ability to change the column or row position without having to manually add the OLE drag and drop events
• Ability to drag and drop the data as text, to your favorite Office applications, like Word, Excel, or any other OLE-Automation compliant
• Ability to drag and drop the data as it looks, to your favorite Office applications, like Word, Excel, or any other OLE-Automation compliant
• Ability to smoothly scroll the control's content moving the mouse cursor up or down
• and more ...