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Manual Reference Pages  - XQueryTree (3X11)

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XQueryTree - query window tree information

CONTENTS

Syntax
Arguments
Description
Bugs

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

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

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

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