I need help with the code to chart with a picture box control, i have an app that has a textbox that is updated in real time with the temperature...I now want a real time graph to enhance it. I would just like a single line plot to show the trends of the values that have come through the textbox. I think updating the line once per minute would be sufficient, and Can it be coded so the old data just "drops off" as the new data is added? I am not worried about saving the data at this point. I would like to hear all comments, and would really like some code snippets to assist me with this. Also, If it would be easier, I will save the data to a text file or db, then run a sort of "report" to produce a graph. I have looked at and played with the code at Mark2150's website, and Im sure its great but I dont think I wanted to do that much,...as I only have one value to plot.