Doubt in include MV45AFZZ

Hi,

Can I use a subroutine(perform) with in the USEREXIT_MOVE_FIELD_TO_VBKD .

I have repeated lengthy code, which needs to call atleast 2 times. So wanted include the code in Perform.

Can I include form, endform with in the include MV45AFZZ.

Pls suggest.

Rgs,

Priya