1XQueryTree(3) XLIB FUNCTIONS XQueryTree(3)
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6 XQueryTree - query window tree information
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9 Status XQueryTree(Display *display, Window w, Window *root_return, Win‐
10 dow *parent_return, Window **children_return, unsigned int
11 *nchildren_return);
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14 children_return
15 Returns the list of children.
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17 display Specifies the connection to the X server.
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19 nchildren_return
20 Returns the number of children.
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22 parent_return
23 Returns the parent window.
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25 root_return
26 Returns the root window.
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28 w Specifies the window whose list of children, root, parent,
29 and number of children you want to obtain.
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32 The XQueryTree function returns the root ID, the parent window ID, a
33 pointer to the list of children windows (NULL when there are no chil‐
34 dren), and the number of children in the list for the specified window.
35 The children are listed in current stacking order, from bottom-most
36 (first) to top-most (last). XQueryTree returns zero if it fails and
37 nonzero if it succeeds. To free a non-NULL children list when it is no
38 longer needed, use XFree.
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40 XQueryTree can generate a BadWindow error.
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43 This really should return a screen *, not a root window ID.
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46 BadWindow A value for a Window argument does not name a defined Window.
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49 XFree(3), XGetWindowAttributes(3), XQueryPointer(3)
50 Xlib - C Language X Interface
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54X Version 11 libX11 1.6.5 XQueryTree(3)