Skip Declaration Of Varibles From Remote Procedure?

Don't know if I phrased the question right, but Say if you had a form named Form1, and on that form you declared a varible like Dim s as Integer = 0, how do you not refer to that varible when you reference a public sub on that form.

Reason for asking, I stepped through my code and noticed if I call Form1.CalculateField() to calculate some values, my calculations where wrong because the value of s was set to lets say 10 before I launched the second form which I call the above from, any how long story short, when the formm is referenced from another form, it evaluates all varibles declared, which means s was set back to 0.