Many icons typically have extra space around their central images, so the padding value is only necessary if additional space is necessary. Padding values can be positive or negative. Negative values cause the icon to overlap the edge of the control. The default icon padding is 0.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)