Manual Pages for UNIX Operating System command usage for man XQueryTree

XLIB FUNCTIONS                                   XQueryTree(3x11)



NAME
     XQueryTree - query window tree information

SYNTAX
     cc [ flag... ] file... -lX11 [ library... ]

     Status XQueryTree(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 win-
     dow 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.

     XQueryTree can generate a BadWindow error.

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

DIAGNOSTICS
     BadWindow A value for a Window argument does not name a
               defined Window.

SEE ALSO
     XFree(3x11), XGetWindowAttributes(3x11), XQueryPointer(3x11)
     Xlib - C Language X Interface




X Version 11        Last change: libX11 1.3.5                   1






XLIB FUNCTIONS                                   XQueryTree(3x11)



ATTRIBUTES
     See attributes(5) for descriptions of the following attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | x11/library/libx11          |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | See XInitThreads(3X11)      |
    |_____________________________|_____________________________|










































X Version 11        Last change: libX11 1.3.5                   2