ElseIf IsNull(Me!CUSTOMER_AR_NUMBER)

What does this (ME!CUSTOMER_AR_NUMBER) mean??

to be more exact what does the _AR_NUMBER mean?? i seeing it in sample code from a book but it doesn't say what it does....

The "Me!" is a prefix that indicates the context for what follows it. Kind of like "this." in C++ or "self." in many Pascal implementations.

-PatP