BEX Variable - Current FY/Period

Hi ,

Currently i have a input variable for Period/FY in my bex query.

i would like to change it customer exit field whereby system detects the current fiscal year period by itself without the need of user keying it in.

I believe variable 0FPER can be used for this.I dont find it in the Variable list for Fiscal Year/Period in my Bex.

Its installed in teh BW system as i can find it at the transport connection object search.

Appreciate it if anyone guide me on how to insert this as part of the variable selection in the FY/Period in BEX query.

Thank you.

Regards

Maili