Programming with Reflection

image\rwnprg32.gif EnqAck property



object.EnqAck = Value

Works with


Data type




Returns (first syntax line) or specifies (second syntax line) whether Reflection uses a form of handshaking called Enq/Ack (ENQuire/ACKnowledge).

HP 3000, HP 1000, and IBM TSO host computers use Enq/Ack handshaking to prevent the terminal (Reflection) from falling too far behind the host system and losing data.

EnqAck pacing works as follows: Whenever the host system has a block of more than 80 characters to send, it sends 80 characters and an ASCII Enq character, and then stops transmitting. When Reflection has processed all of the characters preceding the Enq, it sends an ASCII Ack character, which tells the host that Reflection has caught up and is ready for more data.


The default value is True for Reflection for HP and False for Reflection for UNIX and OpenVMS and Reflection for ReGIS Graphics.


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