TControl.DockOrientation property
How the control is currently docked. (horizontally, vertically, in a notebook, or not at all).
Declaration
property DockOrientation: TDockOrientation read FDockOrientation write FDockOrientation;Description
The property value is assigned when the control is inserted into a docking tree during a drag and dock operation. Its value is used when CalculateDockSizes is called to adjust the height or width for the host dock site.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.