Whether or not this field is null determines much about a Text primitive, like how wrapping or clipping or rotation occurs.
In the absence of a bounding rectangle (if this field is empty), a center point will be used for placement of this Text primitive, and things like clipping and wrapping are not possible.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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