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.TH XkbLockModifiers __libmansuffix__ __xorgversion__ "XKB FUNCTIONS"
.SH NAME
XkbLockModifiers \-  Locks and unlocks any of the eight real keyboard modifiers
.SH SYNOPSIS
.B Bool XkbLockModifiers
(
.I display,
.I device_spec,
.I affect,
.I values
)
.br
      Display *\fIdisplay\fP\^;
.br
      unsigned int \fIdevice_spec\fP\^;
.br
      unsigned int \fIaffect\fP\^;
.br
      unsigned int \fIvalues\fP\^;      
.if n .ti +5n
.if t .ti +.5i
.SH ARGUMENTS
.TP
.I display
connection to the X server 
.TP
.I device_spec
device ID, or XkbUseCoreKbd
.TP
.I affect
mask of real modifiers whose lock state is to change
.TP
.I values
1 => lock, 0 => unlock; only for modifiers selected by affect
.SH DESCRIPTION
.LP
.I XkbLockModifiers 
sends a request to the server to lock the real modifiers 
selected by both 
.I affect 
and 
.I values
and to unlock the real modifiers selected by 
.I affect, 
but not selected by 
.I values. XkbLockModifiers 
does not wait for a reply from the server. It returns True if the request was 
sent, and False otherwise.

The functions in this section that change the use of modifiers use a mask in the 
parameter affect. It is a bitwise inclusive OR of the legal modifier masks: 

.TS
c 
l 
l.
Table 1 Real Modifier Masks
_
Mask
_
ShiftMask
LockMask
ControlMask
Mod1Mask
Mod2Mask
Mod3Mask
Mod4Mask
Mod5Mask
.TE
.SH "RETURN VALUES"
.TP 15
True
The 
.I XkbLockModifiers 
function returns True if a request is sent to the server to lock the real 
modifiers 
selected by both 
.I affect 
and 
.I values
and to unlock the real modifiers selected by 
.I affect, 
but not selected by 
.I values.
.TP 15
False
The 
.I XkbLockModifiers 
function returns False if the request was not sent.