How do I implement Drag and Drop support between ListBoxes?
The code below minimally handles D&D for a single selection list box by handling four events. The D&D is initiated in MouseDown if the user mouses down on the current selection. The DragEnter event is used to set the dragging effect to copy if you are not over the drag source. The DragDrop event is used to do the drop. And finally, the SelectedIndexChanged event is used to track the current selection for use in the MouseDown event. You can download a working project (C#, VB). This project handles additional events to provide visual queues during the drop. The samples referenced above do not allow dragging and dropping within the same listbox. Here is another set of samples that does allow you to drag and drop within the same listbox.
