Man page 3 : XkbTranslateKeyCode

XkbTranslateKeyCode - Translate a keycode to a key symbol and modifiers

Bool XkbTranslateKeyCode (XkbDescPtr xkb , KeyCode key , unsigned int mods , unsigned int * mods_rtrn , KeySym * keysym_rtrn );

• - xkb
      keyboard description to use for translation
• - key
      keycode to translate
• - mods
      modifiers to apply when translating key
• - mods_rtrn
      backfilled with unconsumed modifiers
• - keysym_rtrn
      keysym resulting from translation

mods_rtrnis backfilled with the modifiers consumed by the translation process. modsis a bitwise inclusive OR of the legal modifier masks: ShiftMask, LockMask, ControlMask, Mod1Mask, Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask.The AlwaysConsumeShiftAndLock library control (see below), if enabled, causes XkbTranslateKeyCodeto consume shift and lock. XkbTranslateKeyCodereturns True if the translation resulted in a keysym, and False if it resulted in NoSymbol. The AlwaysConsumeShiftAndLock control, if enabled, forces XLookupStringto consume the Shift and Lock modifiers when processing all keys, even if the definition for the key type does not specify these modifiers. The AlwaysConsumeShiftAndLock control is unset by default.

R XLookupString (3)