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

XQueryTree(3)					    XLIB FUNCTIONS					XQueryTree(3)

NAME
XQueryTree - query window tree information
SYNTAX
Status XQueryTree(Display *display, Window w, Window *root_return, Window *parent_return, Window **chil- dren_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 chil- dren 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), XQueryPointer(3X11) Xlib - C Language X Interface X Version 11 libX11 1.2.1 XQueryTree(3)


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