Hi
I used below code for textbox
 
 
   <cc1:MaskedEditExtender ID="MEE1" runat ="server"
            TargetControlID="Txtprice"
            Mask="999,999,999,999"
            MessageValidatorTip="true"
            MaskType="Number"
            InputDirection="RightToLeft"
            AcceptNegative="Left"
            DisplayMoney="None"
            ErrorTooltipEnabled="True" />
here if I enter wrong digit and want clean wrong digit it doesn't clean I mean I should select all digit and type again
i.e:
I want enter this number==500,256,325 
if I enter 500,44   and want delete 44 and type correct digit(256) it doesn't clean it I press backspace but it doesn't clean it...
what should  do?
best regards
Neda