The CNSChartCtrl control class is derived from CWnd. The purpose is to create pie and bar charts in a dialog (also in a view) with editable fill colors and values, in runtime. Originally, the source code and project was written and compiled with Visual C++ 6.0 SP5 under Windows 98 it also was run in later versions.-The CNSChartCtrl control class is derived from CWnd. The purpose is to create pie and bar ch arts in a dialog (also in a view) with editable fi ll colors and values, in runtime. Originally, the source code and project was written and comp IIED with Visual C 6.0 SP5 under Windows 98 it als o was run in later versions.