Event fired when the mouse has hovered on an element long enough to display a tooltip. Use args.owner to get a reference to the widget. Use args.tooltip to get or set the string to be displayed. Use args.value to get the value of the cell the tooltip is displayed for. Use args.element to get a reference to the cell the tooltip is displayed for. Use args.index to get the row index of the cell the tooltip is displayed for. Use args.columnKey to get the column key of the cell the tooltip is displayed for. Use args.columnIndex to get the column index of the cell the tooltip is displayed for.
Target Platforms: Windows 8.1, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
