Hi!
I need to understand one logic.
I have four txtboxes (
txtbx1, 
txtbx2, 
txtbx3 and 
txtbx4) that should enter any decimal. But I have two caracters "
-" and "
.."
What I need? I need to see appearing in the 
textbox4 the number "
0" (ONLY when this two numbers "-" and ".." are inserted).
see what I try to do but its doesnt make sense:
 private void txtDec1_1_mensal_TextChanged(object sender, EventArgs e)
        {
            if txtbx1.Text 'and ' txtbx2.Text 'and' txtbx3.Text  = '-' then txtbx4.Text = '0';
        }