XQueryTree(3X11)

NAME
       XQueryTree - query window tree information

SYNTAX
       Status XQueryTree(display, w, root_return, parent_return,
       children_return, nchildren_return)
             Display *display;
             Window w;
             Window *root_return;
             Window *parent_return;
             Window **children_return;
             unsigned int *nchildren_return;

ARGUMENTS
       children_return
                 Returns the list of children.

       display   Specifies the connection to the X server.

       nchildren_return
                 Returns the number of children.

       parent_return
                 Returns the parent window.

       root_return
                 Returns the root window.

       w         Specifies the window whose list of children,
                 root, parent, and number of children you want to
                 obtain.

DESCRIPTION
       The XQueryTree function returns the root ID, the parent
       window ID, a pointer to the list of children windows (NULL
       when there are no children), and the number of children in
       the list for the specified window.  The children are
       listed in current stacking order, from bottom-most (first)
       to top-most (last).  XQueryTree returns zero if it fails
       and nonzero if it succeeds.  To free a non-NULL children
       list when it is no longer needed, use XFree.

BUGS
       This really should return a screen *, not a root window
       ID.

SEE ALSO
       XFree(3X11) XGetWindowAttributes(3X11) XQuery- 
       Pointer(3X11) 
       Xlib - C Language X Interface