That is an alternative way to set value for the style.left attribute. Note: if the InitialLocation property is Centered, then left location of control will be adjusted for the value of this property.
Requirements
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