DOKK / manpages / debian 12 / libx11-doc / XkbLatchGroup.3.en
XkbLatchGroup(3) XKB FUNCTIONS XkbLatchGroup(3)

XkbLatchGroup - Latches the keysym group

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

connection to the X server
device ID, or XkbUseCoreKbd
index of the keysym group to latch

XkbLatchGroup sends a request to the server to latch 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:

Table 1 Symbolic Group Names
Symbolic Name Value
XkbGroup1Index 0
XkbGroup2Index 1
XkbGroup3Index 2
XkbGroup4Index 3

The XkbLatchGroup function returns True if a request was sent to the server to latch the specified group.
The XkbLatchGroup function returns False if the request was not sent.

libX11 1.8.4 X Version 11