I need to pass my variable into the subtract function

[ALSPI]

I have a calibration loop in my program for the resistance check. We use a .005 standard for calibration. Check the standard subtract the diffenece from .0050 make adjustments. Now they want to manually put in the standard .0052 I have a pop up created for this but how do I pass the number into the subtract function?

[Dennis_Knutson]

I can't see your VI documentation. You probably need to attach all of the additional files that the VI documentation tool creates. In any case, look at the example called Dialog Box Demo.vi. The only difference between that and what you want is that the demo returns a string thats wired to a indicator and you want to return a number.