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XDeviceBell - ring a bell on a device supported through
the input extension 
- Status XDeviceBell(Display *display, XDevice
*device, XID 
- *feedbackclass, XID *feedbackid, int *percent);  
- display
- Specifies the connection to the X server. 
- device 
- Specifies the device with
which the bell is associated. 
- feedbackclass 
- Specifies the class of the feedback
with which the bell is associated. 
- feedbackid 
- Specifies the id of the feedback
with which the bell is associated. 
- percent 
- Specifies the volume in the range
-100 to 100 at which the bell should be rung. 
The XDeviceBell
request causes the server to ring a bell on the  specified feedback of
the specified device, if possible.   The specified volume is relative to
the base volume for the bell. If an invalid device is specified, a BadDevice
error will be returned.  The feedbackclass and feedbackid parameters contain
values returned by an XGetFeedbackControl request and uniquely identify
the bell to ring.  If a feedbackclass is specified that does not support
a bell, or if a nonexistent feedbackid is specified, or a percent value
is specified that is not in the range -100 to 100, a BadValue error will
be returned.
The volume at which the bell is rung when the percent argument
is  nonnegative is: 
- base - [(base * percent) / 100] + percent 
The volume
at which the bell rings when the percent argument is negative is: 
- base
+ [(base * percent) / 100] 
To change the base volume of the bell, use XChangeFeedbackControl.
XDeviceBell can generate a BadDevice or a BadValue error. 
- BadDevice
- An invalid device was specified.  The specified device does not exist, or
has  not been opened by this client via XOpenInputDevice. 
- BadValue 
- An invalid
feedbackclass, feedbackid, or percent value was specified. 
XChangeFeedbackControl(3X)
,
XBell(3X)
Programming With Xlib 
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