| **Navigation:**  [[introduction.htm|Language Reference]] > [[chapter runtime properties.htm|App C - PROP: Runtime Properties]] > Runtime VIEW and FILE Properties >====== PROP:CurrentKey ====== | [[prop connectstring.htm|{{btn_prev_n.gif|Previous page}}]][[chapter runtime properties.htm|{{btn_home_n.gif|Return to chapter overview}}]][[prop datapath.htm|{{btn_next_n.gif|Next page}}]] |
|  ||

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**