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X11R7.4 - man page for xquerytree (x11r4 section 3)

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XQueryTree(3)				  XLIB FUNCTIONS			    XQueryTree(3)

       XQueryTree - query window tree information

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

		 Returns the list of children.

       display	 Specifies the connection to the X server.

		 Returns the number of children.

		 Returns the parent window.

		 Returns the root window.

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

       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.

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

       XFree(3X11), XGetWindowAttributes(3X11), XQueryPointer(3X11)
       Xlib - C Language X Interface

X Version 11				   libX11 1.2.1 			    XQueryTree(3)
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