User Control

I am about to begin a lot of equal calculations. User Controls are taylor made for that. But I have some problems realising this.

In my user control I have:
A label, lblDimension, with the dimensions varying from 20, 22, 25, 28 to 110 mm.

Two text boxes where I enter the energy supply, txtEnergy, and the length, txtLength.

And finally I have three labels which contain different calculations:

lblRes1.txt = CSng(lblDimension.txt * txtEnergy.txt + txtLength.txt)

lblRes2.txt = CSng(lblDimension.txt + txtEnergy.txt *txtLength.txt)

lblRes3.txt = CSng(lblDimension.txt - txtLength.txt*4)

How do I specify the value of lblDimension for each of the 20 different calculations?

I have attached a zip file which contains the complete Visual Studio Project.

Could you elaborate on this:
How do I specify the value of lblDimension for each of the 20 different calculations?

Hi, sorry for being unprecise. What I mean is that I wish to SET the lblDimension.text for each of the user controls.

UC1:
lblDimension.text = "20"

UC2:
lblDimension.text = "22"

UC3:
lblDimension.text = "25"

UC4:
lblDimension.text = "28"

and so on.