Hello, Seems like you're looking at GUIX Audio Player application. The message codes are not explicitly linked with message class, however this application note creates some sort of correlation by using common prefix before event and code name. gui_thread_entry is a subscriber for system messages that need to be channeled into GUIX. GUIX uses different message interface, based around ThreadX Queues. GUI Thread receives the messages and creates appropriate GX_EVENT data before placing it on a queue. Regards
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