ChartViewer is an ActiveX Control for viewing ChartDirector charts in Windows applications, and for providing tool tips, hot spots and viewport support.

WebChartViewer is the server side class library that works with the browser side JsChartViewer control. Its main functions are to support viewport, partial chart update (AJAX update) and programmable track cursor.

WebViewPortControl is the server side class library that works with the browser side JsViewPortControl. It provides a user interface for visualization and control of the WebChartViewer viewport.