So currently i use
Code:
Label44.Text = Format(Convert.ToDouble(Label44.Text), "#,###,###")
to convert numbers in labels to the correct format. I had a bunch of friends test the software and the ones that were having problems were from Europe where , and . are placed different "i think". And when they run the program they get a error saying something about the todouble line (can't get exact error it was in french.)

Could they be experiencing the error because their windows are in a different language setting which has different place values for "," and "."? is there a way to fix this so everyone can use my program ?