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                           About Device Monitors
 
This topic describes device monitors and the device-monitor functions. These
functions examine and modify input from devices such as the keyboard and the
mouse before the input is made available to any other program.
 
A device monitor is a special type of program input in which a program
receives raw input directly from a device such as the keyboard or the mouse
before the input is passed on to any program that may be reading from the
device. A program can use a device monitor to inspect, modify, insert, and
remove information as it passes from the device to other programs.
 
 
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