Deciaml Place Question (Reiterated)

Maybe I'm explaining this wrong.
This is what I have now:

txtAve.Text = (Val(txt1a) + Val(txt2a)) / (Val(txt1) + Val(txt2))

Currently when you click the cmd button that calculates txtAve's result, you get multiple positions past the decimal. I want to limit how many spaces. ex: 0000.000 or .00

I'm sorry if I've made this so confusing.

Thanks again.

txtAve.Text = Round((Val(txt1a) + Val(txt2a)) / (Val(txt1) + Val(txt2)),2)

i.e. Round(numberToRound,numberAfterDecimal)