Windows Messaging Mechanism

Windows program message loop mechanism : When an application is established, the operating system assigns a message queue to the application, and the operating system puts the messages associated with the program into the message queue. The application then takes advantage of getmessage to take a specific message from the message queue and dispatchmessage the message to the operating system, which is processed using the window callback function WinProc specified by the Design window class. The winproc responds differently to no messages. Its specific process .

P S: Message Queuing: First in, out of the cache .

Windows Messaging Mechanism