RISC OS Open

RISC OS  OPEN


A fast and easily customised operating system for devices using ARM processor cores.

Documentation: The Window Manager Messages Overview

Programmer’s Reference Manuals
» Part 7 – The Desktop
» The Window Manager
» Messages
» Oerview
Overview

Tasks communicate with each other and via the Wimp via Messaging. A task is notified of receiving a message via Wimp_Poll. The Wimp also uses messages to notify tasks of important events such as mode changes, font changes and tasks needing to be closed down.

The number of message codes is very large, and not every code needs to be supported, however, every task must take action when receiving Message_Quit. This code is broadcast when a task is asked to quit via the Task Display window (via Task Manager).

Please see the Message Codes for a list of the most common message codes

See also

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