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đ¤ Author: by writer 2020-09-15 07:27:49 |
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2, an operating system user can feel to the operation of the input device, such as the movement of the mouse, keyboard button is pressed an inferior, and you can know the location of the mouse, by press the keyboard characters, Windows will be packed this information into a message, the other operating system would send this message to the message queue, the application invokes the message response function for the corresponding processing
3, said the application can notify the operating system performs a specific action, in order to make the application of indirect by OS hardware operation, actually programmers need to focus only on the application and interaction of the operating system can, for the operating system is simply an idea how to control hardware devices, this process is the process of application of Windows API calls, a process called system calls, through the system to provide the interface function can command the operating system to do the work.
Indicates that the operating system can upload changes to input devices to the application, and widows do not respond to generated events; instead, messages are passed to message queues or directly to an object for processing. PostVer 0
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