constants BackgroundPartEnum
The BackgroundPartEnum type indicates parts in the control. Use the Background property to specify a background color or a visual appearance for specific parts in the control. A Color expression that indicates the background color for a specified part. The last 7 bits in the high significant byte of the color to indicates the identifier of the skin being used. Use the Add method to add new skins to the control. If you need to remove the skin appearance from a part of the control you need to reset the last 7 bits in the high significant byte of the color being applied to the background's part.

NameValueDescription
exSeparatorItem0 Specifies the visual appearance for a separator item.
exButtonItem1 Specifies the visual appearance for an item, when the Appearance property is Button.
exSelectRootItem2 Specifies the visual appearance for a top level item, when the Appearance property is Flat.
exToolTipAppearance64 Indicates the visual appearance of the borders of the tooltips. Use the ToolTipPopDelay property specifies the period in ms of time the ToolTip remains visible if the mouse pointer is stationary within a control. Use the ToolTipWidth property to specify the width of the tooltip window. The ToolTipDelay property specifies the time in ms that passes before the ToolTip appears. 
exToolTipBackColor65 Specifies the tooltip's background color.
exToolTipForeColor66 Specifies the tooltip's foreground color.