Use the ToolTipWidth property to specify the width of the tooltip window. The height of the tooltip window is computed based on the tooltip's description. The ToolTipPopDelay property specifies the period in ms of time the ToolTip remains visible if the mouse pointer is stationary within a control. The ToolTipDelay property specifies the time in ms that passes before the ToolTip appears. The ToolTipFont property changes the font for the control's tooltip. Use the CellToolTip property to specify the cell's tooltip. Use the ShowToolTip method to display a custom tooltip.