The ambient horizontal alignment is the alignment inherited from the cell's parent in the case where its own HorizontalAlignment property is not explicitly set.
If the value of the GridElement.IsHorizontalAlignmentAmbient property is true then both the AmbientHorizontalAlignment and HorizontalAlignment properties will return the same value.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2