RAD Studio VCL Reference
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TButtonGroup.DragIndex Property
TButtonGroup Class | TButtonGroup Members | ButtonGroup Namespace | Description | See Also
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DragIndex defines the index of the button during drag operations.

Pascal
property DragIndex: Integer;
C++
__property int DragIndex;
Description

If a drag operation is coming from this control, it is because they are dragging the item at DragIndex. Set DragIndex to control which item is being dragged before manually calling BeginDrag. 

 

See Also
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