| Navigation: Language Reference > App C - PROP: Runtime Properties > Runtime VIEW and FILE Properties >====== PROP:CurrentKey ====== |    |
Property of a FILE that returns a reference to the current KEY or INDEX being used for sequential processing, or the current key being built during a BUILD or PACK operation (READ ONLY). Valid only as the source side of a reference assignment statement or in a logical expression comparing the return result to NULL. Returns NULL if the file is being processed in record order.
Example:
KeyRef &KEY
Customer FILE,DRIVER('Clarion'), PRE(Cus)
NameKey KEY(Cus:Name),DUP
Record RECORD
Name STRING(20)
. .
CODE
OPEN(Customer)
SET(Customer)
KeyRef &= Customer{PROP:CurrentKey) !Returns NULL
IF Customer{PROP:CurrentKey) &= NULL !Compare to NULL
MESSAGE('SET to record order')
END
SET(Cus:NameKey)
KeyRef &= Customer{PROP:CurrentKey) !Returns reference to Cus:NameKey