Maximum range between upper and lower value.

[Jitenderios]

HI William ,
I wanted your help. In my project,
rangeSlider.minimumValue = 0
rangeSlider.maximumValue = 86400
rangeSlider.lowerValue = 0
rangeSlider.upperValue = 43200

My requirement is at any given time, Just make sure the difference between the start time and end time is not more than 43200. How do I achieve this. I just want user to restict, i.e Once it's differeence of upper value and lower value equal to 43200, users can not drag any further. If it is less than 43200, only in this case user can drag.
Please help, how to acheive this.

Thanks,
Jitender