!XGetWindowProperty|int
    w                long
    property         Atom
    long_offset      long
    long_length      long
    delete           Bool
    req_type         Atom
    actual_type      Atom out
    actual_format    int out
    number_of_items  long out
    bytes_after      long out
    data             pointer out free
!XQueryTree|int
    w                long
    root             long out
    parent           long out
    children         pointer out free
    nchildren        int out
!XTranslateCoordinates|int
    scr_w            long
    dest_w           long 
    src_x            int
    src_y            int
    dest_x           int out
    dest_y           int out
    child            long out