DynaPlot is a real-time chart control for technical and scientific applications. Built-in tools such as autoscale, pan, scroll, stacked zoom, and cursors let the user examine the data quickly and easily. Features include line, bar, and scatter plots; dynamic scaling of chart elements with window extent; limit lines and tolerance masks with highlighted tolerance violations for use in quality control applications; linear and logarithmic scaling; automatic grid lines; and PNG-encoded files for server applications. Multiple examples are included in Visual Basic, Visual C, and .NET.