Vary voltage based on pot value

I trying to vary the voltage to a motor that is controlled by a joystick based on the input of a separate pot. I'm new to this type of scripting. I think I can get this done by using the MXP... commands but I'm seem to be stuck. The code I've written is

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SpeedInMax = 50 ' max pot value * 10
SpeedInMin = 0 ' min pot value
SpeedIn = GetValue(_ANAIN,1) * 10 ' actual pot value
Voltset = SpeedInMax + (SpeedInMax * SpeedIn / SpeedInMax) ' set MXP.. between 50 and 100
~MXPF 1 Voltset
Print (Voltset) ' just to check my math
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My confusion is setting the MXP... commands

Any help would be greatly appreciated

You may want to check and modify one of our sample scripts.

dev.roboteq.com/dev1/index.php/support/downloads

Analog throttle.