XkbKeysymToModifiers finds the set of modifiers currently bound to the keysym ks on the core keyboard. The value returned is the mask of modifiers bound to the keysym ks. If no modifiers are bound to the keysym, XkbKeysymToModifiers returns zero; otherwise, it returns the inclusive OR of zero or more of the following: ShiftMask, ControlMask, LockMask, Mod1Mask, Mod2Mask, Mod3Mask, Mod4Mask, and Mod5Mask.