By default, the ToolTipHeight property is 96 pixels. Use the ToolTipHeight property to change the tooltip window height. The height of the tooltip window is automatically computed based on tooltip's description. If the tooltip property displays a custom size picture, the ToolTipHeight property specifies the height of the tooltip. The ToolTipWidth property specifies a value that indicates the width of the ToolTip, in pixels. If the ToolTipDelay or ToolTipPopDelay property is 0, the tooltip is never shown. The ToolTipDelay property Specifies the time in ms that passes before the ToolTip appears. 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 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.