Hi helmekki
You need to set texrbox1 to an integer.
You can either do this in code with the
line I added or right click the textbox and
set the value in the properties box.
Also; add another command button and
paste Dave's suggested code, it will work
with the same textboxes on the form.
You might want to change the format
to ###.00
Private Sub CommandButton1_Click()
Dim box1 As Integer
Dim box2 As Integer
Dim box3 As Integer
Dim box4 As Integer
box1 = TextBox1.Value
box2 = TextBox2.Value
box3 = TextBox3.Value
box4 = TextBox4.Value
'add this line or cut and paste
TextBox1.Value = 0
box1 = (box2 - (box3 + box4))
MsgBox box1, , "Good Luck TK"
TextBox1.Value = box1
End Sub
Good Luck
TK