Use the ToolTipFont property to assign a font for the control's tooltip. Use the ToolTipDelay and ToolTipPopDelay properties to define the time before showing a tooltip and the period of the time that tooltip remains visible if the mouse pointer is stationary within a control. Use the AddKeyword method to specify the tooltip description for a keyword. Use the ToolTipOnTyping property to display the keyword's tooltip while typing in the control. Use the Background(exToolTipAppearance) property indicates the visual appearance of the borders of the tooltips. Use the Background(exToolTipBackColor) property indicates the tooltip's background color. Use the Background(exToolTipForeColor) property indicates the tooltip's foreground color.