Applies To:

TCPSocket

Description

The TargetState property reflects the intended final state of a TCPSocket object. Its possible values are as follows:

Stream	UDP
Client	Open
Server	Bound
Closed	Closed

Setting TargetState to Closed is the recommended way to close a socket. It informs APL that you want the socket to be closed, but only when it is safe to do so. When all the data has been sent, the TCPSocket will generate a TCPClose event which, unless a callback function decides otherwise, will cause the TCPSocket object to disappear.

To control socket closure, you may execute the following steps:

1. Set TargetState to Closed
2. Either:
   1. continue processing or
   2. wait (using ⎕DQ) for the TCPSocket  to disappear or
   3. wait (using ⎕DQ) for the TCPClose  event