SuSE 11.3 - man page for xkbsetmodactionvmods (suse section 3)

XkbSetModActionVMods(3) 		  XKB FUNCTIONS 		  XkbSetModActionVMods(3)

NAME
       XkbSetModActionVMods  - Sets the vmods1 and vmods2 fields of act using the vmods format of
       an Xkb modifier description

SYNOPSIS
       void XkbSetModActionVMods (XkbAction act, unsigned short vmods);

ARGUMENTS
       - act  action in which to set vmods

       - vmods
	      virtual mods to set

DESCRIPTION
       XkbSetModActionVMods sets the vmods1 and vmods2 fields of act using the vmods format of an
       Xkb modifier description.

NOTES
       Despite	the fact that the first parameter of these two macros is of type XkbAction, these
       macros may be used only with Actions of type XkbModAction and XkbISOAction.

X Version 11				   libX11 1.3.2 		  XkbSetModActionVMods(3)