Xlib − C Language X Interface

Xlib − C LibraryX11, Release 6.7 DRAFTKeySym XKeycodeToKeysym (display, keycode, index)Display *display;KeyCode keycode;int index;displaykeycodeindexSpecifies the connection to the X server.Specifies the KeyCode.Specifies the element of KeyCode vector.The XKeycodeToKeysym function uses internal Xlib tables and returns the KeySym defined forthe specified KeyCode and the element of the KeyCode vector. Ifnosymbol is defined, XKeycodeToKeysymreturns NoSymbol.To obtain a KeyCode for a key having a specific KeySym, use XKeysymToKeycode.KeyCode XKeysymToKeycode (display, keysym)Display *display;KeySym keysym;displaykeysymSpecifies the connection to the X server.Specifies the KeySym that is to be searched for.If the specified KeySym is not defined for any KeyCode, XKeysymToKeycode returns zero.The mapping between KeyCodes and KeySyms is cached internal to Xlib. When this informationis changed at the server, anXlib function must be called to refresh the cache. To refresh thestored modifier and keymap information, use XRefreshKeyboardMapping.XRefreshKeyboardMapping(event_map)XMappingEvent *event_map;event_mapSpecifies the mapping event that is to be used.The XRefreshKeyboardMapping function refreshes the stored modifier and keymap information.You usually call this function when a MappingNotify event with a request member ofMappingKeyboard or MappingModifier occurs. The result is to update Xlib’s knowledge ofthe keyboard.To obtain the uppercase and lowercase forms of a KeySym, use XConvertCase.401