XkbFindOverlayForKey

char * XkbFindOverlayForKey (XkbGeometryPtr geom, XkbSectionPtr section, char *under);

- geom

geometry that contains the section

- section

section to be searched for matching keys

- under

primary name of the key to be considered

Keys that can generate multiple keycodes may be associated with multiple names. Such keys have a primary name and an alternate name.

XkbFindOverlayForKey uses the primary name of the key, under, to look up the alternate name, which it returns.