>hi all,
>
>i insert a number in textbox at myform,when i return back to the textbox after enter he delete the value (replace with 0), how i can keep this value as its.

Do you mean you want the field to go back to being blank when the value is deleted? If you never want to show a zero, then you could set the textbox's Format property to Z. If you want to ability to enter a zero, then the field you use as the controlsource for the textbox would have to allow null values. You'll also want to SET NULLDISPLAY TO "" so that the textbox doesn't show .NULL.