October 2003
Intermediate to advanced
736 pages
15h 25m
English
Content preview from Windows Forms Programming in Visual Basic .NETBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
Drag and Drop
No matter what kind of controls you're using or building, often you'd like to enable the user to drag data from one to another. This communication protocol, known as drag and drop, has long been standardized and is fully supported in WinForms for both targets and sources.
The Drop Target
Adding drag and drop to your application involves two elements: the drop target and the drop source. First, you must have a control that supports having things dragged and dropped onto it. This kind of control is known as the drop target. You designate your target by setting the AllowDrop property of the control to true.
Next, you make the target control subscribe to one or more of the drag-and-drop events:
DragEnter is fired when the mouse enters ...