Device Access C Under Windows in C programming language

All devices under Windows are shared amongst all the running programs. Hence no program is permitted a direct access to any of the devices. The access to a device is routed through a device driver program, which finally accesses the device. There is a standard way in which an application can communicate with the device driver. It is device driver’s responsibility to ensure that multiple requests coming from different applications are handled without causing any conflict. This standard way of communication is discussed in detail