small issue with field displaying 0

hI all,

I have a field type numc length 4 in my ztable.

i am placing this field in one my screen,its only an out put field.

when i go to this screen i see a value 0 in the box .

when i go into debug mode before going to pbo and in pbo of this screen. i has a value 0000 an in the screen 0.

i don't want to this 0 to be displayed because when iam saving a number is generated for this field . when i am generating the zero is replaced by generated number but i don't want to display the number 0 in the screen before saving.

Let me know if iam missing anything

kajol