How to derive value from another variable and use it to read master data?

Hi,

I have following case:

First I need to read the value from Cost Center -variable (ZIPCC) and then I need to use that value to determine the home currency of that cost center from the cost center master data table (field: OBJ_CURR).

I know to basic idea on how to do this, but don't seem to get the syntax correct. Could someone point me in the right direction?

So the objects in play are:

ZIPCC = Cost center selection variable (mandatory, single value)

ZIPCUR = Cost Center Currency variable (customer exit, single value)

0COSTCENTER

0OBJ_CURR = Field in cost center master data

Help will be greatly appreciated!

-m