Searching for onMouseOver event

My searching of Resources.esri.com says that ArcEngine handles with some of the mouse events. Here is the definition of these methods according to ArcEngine developer tool kit.

http://edndoc.esri.com/arcobjects/9.2/Java/api/arcobjects/com/esri/arcgis/schematic/INgProjectTool.html#mouseMove%28com.esri.arcgis.schematic.INgView,%20int,%20int,%20int,%20int,%20int,%20int,%20double,%20double%29

The following link describes some parameters of a cell (I need to know what does a 'cell' mean). It also describes how to clip parameters with a cell.

http://resources.esri.com/help/9.3/ArcGISEngine/java/Gp_ToolRef/using_geoprocessing_tools/parameter_status_colors_and_messages.htm

I could meet Jake this morning. I got a copy of ArcGIS Engine software from him (I also got a returnable DVD from McKengie Hall). Now I need to install this to my computer.