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Ticket A1056
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How to reorder the pages in the ExpressPageControl via drag-and-drop

created 21 years ago

Description:
I wish to allow an end-user to reorder the pages in the ExpressPageControl at runtime. How can I implement this?

Answer:
You should set the PageControl's DragMode property to the dmAutomatic value and handle the control's OnStartDrag, OnDragOver and OnDragDrop events. The first one is necessary to create a DragObject instance and save the Tab which is about to be dragged. The second event is necessary to prevent the end-user from dropping a tab onto itself. Finally, you need to handle the OnDragDrop event to reorder pages. This can be done if you set the Tab's PageIndex property value.
Attached you will find a sample project showing how this can be done.
See also:
How do I determine under which tab of a PageControl the mouse pointer is above

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