Simple Math Functions

[Maerd]

Hey, I'm kind of new kind of not to programing, I know basic syntax's and all that, but for some reason I can't get a simple addition function to work. I'm trying to make a very simple calculator for my first project. It irretates me so much that subtraction, multiplication, division all work but not addition. It does 1+1=11, 25+4=254, etc... Any help? Here's the code:

Private Sub Add_bttn_Click()
Numb_3 = Numb_1 + Numb_2
End Sub
Private Sub Div_Bttn_Click()
Numb_3 = Numb_1 / Numb_2
End Sub
Private Sub Mul_Bttn_Click()
Numb_3 = Numb_1 * Numb_2
End Sub
Private Sub Sub_Bttn_Click()
Numb_3 = Numb_1 - Numb_2
End Sub

[Lightning]

Declare numb_1 , numb_2 and numb_3 as integers. The problem will (should) be solved

[dcronje]

I think the following should work as well:
Numb_3 = VAL(Numb_1)+VAL(Numb_2)

[Professor29]

Try this:

Function Add(Num1, Num2)
    Num3 = Num1 + Num2
    Return Num3
End Function

My syntax is probably screwed up, due to the fact that I don't have anything to write it in.