h6. [[WindowManager]] h6(. » [[WindowManager SWI Calls|SWI Calls]] h6((. » [[Wimp_Poll|Wimp_Poll]] h6(((. » [[Reason Codes|Reason Codes]] h6((((. » User_Message_Acknowledge h2. User_Message_Acknowledge h5. (Reason Code 19) |_<. Exit | | |<^. Block | | |>^. +0|Length of block | |>^. +4|Task handle of sender | |>^. +8|My ref (senders reference number for this message) | |>^. +12| Your ref (senders reference number for a previous message) | |>^. +16|[[Message Codes|Message Code]] | |>^. +20|… data… | h4. Use This code is returned from [[Wimp_Poll|Wimp_Poll]] and indicates that the message sent from this task was not acknowledged by any recipients. h4. Notes 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. h4. See also * [[Message Codes|Message Codes]] * [[Reason Codes|Reason Codes]] * [[User_Message|User_Message]] * [[User_Message_Recorded|User_Message_Recorded]] * [[Wimp_Poll|Wimp_Poll]] * [[Wimp_SendMessage|Wimp_SendMessage]]