Drag From Events property
Use the Drag From Events property to enable drag handling for a component from which you want to allow drag-and-drop capabilities.
To use this functionality, you must define one or more "drag from" events and at least one matching "drop on" property with events.
注意：
- In the Events tab of the Component properties sheet, there is no visual indication of whether this property is being employed. To determine whether there are any events associated with a given component, you must open the Edit Drag From/Drop On Events dialog box.
- You can use this property with any component type except form pages, toolbar buttons, or menu items.
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