I am new to the vb.net thing and am trying to self teach myself so any help is appreciated. I need to be able to make sure that a textbox entry is only numbers and that I can backspace it to remove a bad entry. I think its probably something like a bunch of ASCII characters to reference and valadate the entry but I am not sure. Sub Text_KeyPress(KeyAscii As Integer) If uiEnterInterNumTextBox.Text = KeyAscii < 48 Or KeyAscii > 57 Then KeyAscii = 0 and uiEnterInterNumTextBox.Text = KeyAscii End Sub