If the ToolTipDelay or ToolTipPopDelay property is 0, the tooltip is never shown. 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. Use the ToolTipHeight property to specify the height of the tooltip window. Use the ShowToolTip method to display the tooltip. Use the HideToolTip method to hide programmatically the tooltip. Use the Appearance property to specify the tooltip's appearance.