|+0||Length of block|
|+4||Handle of sender|
|+8||My ref (senders reference number for this message)|
|+12||Your ref (senders reference number for a previous message)|
This code is returned from Wimp_Poll and indicates that the message sent from this task was not acknowledged by any recipients.
A task that does not understand a message code should simply ignore it. Tasks should not respond to messages for no reason. When no tasks respond to a User_Message_Recorded message, the Wimp will send this message back to the task that originally sent the message.
The message code determines the meaning of the message sent.