Hi Gary,

Gary Phillips wrote:
I've got four textboxes... The first three are enabled, the fourth is
not.

I want the user to be able to enter an integer value into the first
three and it will add those three values into the fourth box. I do
not want the user to have to press any buttons, I want it to update
as the user goes along.

Something like this should work for you:

Private Sub TextBox1_Change()
CalcTotal
End Sub

Private Sub TextBox2_Change()
CalcTotal
End Sub

Private Sub TextBox3_Change()
CalcTotal
End Sub

Private Sub TextBox1_KeyPress(ByVal KeyAscii As _
MSForms.ReturnInteger)
If KeyAscii < Asc("0") Or KeyAscii Asc("9") Then
Interaction.Beep
KeyAscii = 0
End If
End Sub

Private Sub TextBox2_KeyPress(ByVal KeyAscii As _
MSForms.ReturnInteger)
If KeyAscii < Asc("0") Or KeyAscii Asc("9") Then
Interaction.Beep
KeyAscii = 0
End If
End Sub

Private Sub TextBox3_KeyPress(ByVal KeyAscii As _
MSForms.ReturnInteger)
If KeyAscii < Asc("0") Or KeyAscii Asc("9") Then
Interaction.Beep
KeyAscii = 0
End If
End Sub

Private Sub CalcTotal()
TextBox4.Text = CLng("0" & TextBox1.Text) + _
CLng("0" & TextBox2.Text) + _
CLng("0" & TextBox3.Text)
End Sub


You'll probably want to set the MaxLength property of the 3 textboxes to
something manageable to avoid overflow errors.

--
Regards,

Jake Marx
MS MVP - Excel
www.longhead.com

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