I am using VC#.
On the main form I have a start button which calls a routine to start taking voltage measurments and displays the measured data. The full test can take several hours. I need to have another button on the form, STOP, to stop this routine at any stage.
I have tried adding a button but when the main routine starts the stop button has no affect, the code here never gets called.
How can I structure the program so that the buttons on the form still work.