XkbGetKeyVirtualModMap - Obtain the virtual modifier map (the vmodmap array) for a subset of the keys in

dpy    connection to server

       first  keycode of first key to fetch

       num    number of keys for which virtual mod maps are desired

       xkb    Xkb description where results will be placed

XkbGetKeyVirutalModmap sends a request to the server to obtain the virtual modifier mappings for num keys
       on the keyboard starting with key first.  It waits for a reply and returns the virtual modifier  mappings
       in  the  server->vmodmap  array  of  xkb.  If successful, XkbGetKeyVirtualModMap returns Success. The xkb
       parameter must be a pointer to a valid Xkb keyboard description.

       If the server map in the xkb parameter has  not  been  allocated,  XkbGetKeyVirtualModMap  allocates  and
       initializes it before obtaining the virtual modifier mappings.

       If  the  server  does  not  have  a compatible version of Xkb, or the Xkb extension has not been properly
       initialized,  XkbGetKeyVirtualModMap  returns  BadMatch.  If  num  is  less  than  1  or   greater   than
       XkbMaxKeyCount,    XkbGetKeyVirtualModMap   returns   BadValue.   If   any   allocation   errors   occur,
       XkbGetKeyVirtualModMap returns BadAlloc.

BadAlloc       Unable to allocate storage

       BadMatch       A compatible version of Xkb was not available in the server or  an  argument  has  correct
                      type and range, but is otherwise invalid

       BadValue       An argument is out of range

X Version 11                                      libX11 1.8.12                        XkbGetKeyVirtualModMap(3)

       XkbGetKeyVirtualModMap  - Obtain the virtual modifier map (the vmodmap array) for a subset of the keys in
       a keyboard description

       Success        The XkbGetKeyVirutalModmap function returns Success following a successful reply from  the
                      server  to obtain the virtual modifier mappings for num keys on the keyboard starting with
                      key first.

StatusXkbGetKeyVirtualModMap(Display*dpy,unsignedintfirst,unsignedintnum,XkbDescPtrxkb);