XkbLockModifiers - Locks and unlocks any of the eight real keyboard modifiers

display
              connection to the X server

       device_spec
              device ID, or XkbUseCoreKbd

       affect mask of real modifiers whose lock state is to change

       values 1 => lock, 0 => unlock; only for modifiers selected by affect

XkbLockModifiers sends a request to the server to lock the real modifiers selected  by  both  affect  and
       values  and to unlock the real modifiers selected by affect, but not selected by 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:

       Table 1 Real Modifier Masks
       ────────────────────────────
       Mask
       ────────────────────────────
       ShiftMask
       LockMask
       ControlMask
       Mod1Mask
       Mod2Mask
       Mod3Mask
       Mod4Mask
       Mod5Mask

       XkbLockModifiers -  Locks and unlocks any of the eight real keyboard modifiers

       True           The  XkbLockModifiers function returns True if a request is sent to the server to lock the
                      real modifiers selected by both affect  and  values  and  to  unlock  the  real  modifiers
                      selected by affect, but not selected by values.

       False          The XkbLockModifiers function returns False if the request was not sent.

X Version 11                                      libX11 1.8.12                              XkbLockModifiers(3)

BoolXkbLockModifiers(Display*display,unsignedintdevice_spec,unsignedintaffect,unsignedintvalues);