XkbLockGroup - Man Page

Bool XkbLockGroup (Display *display, unsigned int device_spec, unsigned int group);

display

connection to the X server

device_spec

device ID, or XkbUseCoreKbd

group

index of the keysym group to lock

XkbLockGroup sends a request to the server to lock the specified group and does not wait for a reply. It returns True if the request was sent and  False otherwise.

Reference the keysym group indices with these symbolic constants:

True

The XkbLockGroup function returns True when a request was sent to the server to lock the  specified group and does not wait for a reply.

False

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