The joystick is an ancillary input device for applications that provide
alternatives to using the keyboard and mouse. The joystick provides positional
information within a coordinate system that has absolute maximum and minimum values
in each axis of movement.
Joystick services are loaded when the operating system is started. The
joystick services can simultaneously monitor two joysticks, each with two- or
three-axis movement. Each joystick can have up to four buttons. You can use the
joystick functions to determine the capabilities of the joysticks and joystick driver.
Also, you can process a joystick's positional and button information by
querying the joystick directly or by capturing the joystick and processing messages
from it. The latter method is simpler because your application does not have to
manually query the joystick or track the time to generate queries at regular
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