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Developing a charting control

Using VB.NET, voltage values are transferred through the communications port of the computer. How does one take those values (we managed to write a code to/from communication from the communications port) and put it to a live graph, so every 0.25 seconds the graph will graph the voltage?
Instead of reinventing the wheel and developing yet another charting control, I'd recommend that you purchase Dundas Chart, which is the best of the third-party charting solutions. It will do everything you want and pretty much things you never thought possible.

This was first published in August 2003