XQueryTree(3X11) X Version 11 (Release 6.6) 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), XQueryPointer(3X11)
Xlib - C Language X Interface
Page 1 (printed 7/20/06)
