Show the autohide icon for the left dock area
Member of Tab Folder (PRIM_TAB)
Data Type - Boolean
The LeftAllowAutoHide property specifies whether the left dock area can be hidden. When True the AutoHide pin will be shown in the top left corner of the active tab with a DockPosition of Left. When clicked, the left area will collapse so that only the tabs are visible.
Febuary 18 V14SP2