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BulbSpan Property
Span of a thermometer-style bulb shape to be rendered at the start of this marker. To enable a bulb shape, set this property to a non-zero value greater than the difference of OuterExtent and InnerExtent.
Target Platforms: Windows 10, Windows 8.1, Windows 8, 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