Younger brother novice inquired, written in BCB a PC, with the chart control waveform figure, horizontal axis is time, the vertical axis data are real-time data and want to draw a line chart, is under the window display only 10 to 15 points, and then to display the latest data is 10-15, but has the function of the scroll bar to view historical data, can realize, you great god teach the younger brother, younger brother novice to control is not quite understand, first thank passing eldest brother here,