problem in adding field values?

Hi all,

I am using table COSP in my program. The requirement is i need to add the field values(SMEXXX) of this table structure until the period entered in seletion-screen.

i.e if the period is 005.

i need to add

SME001 UNTIL SME005 TO a variable.

if the period is 007 then

SME001 UNTIL SME007.

I need the logic to choose the no of field values dynamically? please help me.

Thanks,

aravind.