voltage to force code

I need to write a code that converts voltages (taken from a load cell into a 16 bit microdaq, which comes with a vb code) into forces, so I can plot these on a graph

so what is your queston?

Read the voltage, using the VB code that comes with the DAC, and use the calibration chart (that comes with the DAC or that you create by calibrating it) to convert the voltage to a force.