osx man page for tk_getrootcoords

Tk_GetRootCoords(3)					       Tk Library Procedures					       Tk_GetRootCoords(3)

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NAME
       Tk_GetRootCoords - Compute root-window coordinates of window

SYNOPSIS
       #include <tk.h>

       Tk_GetRootCoords(tkwin, xPtr, yPtr)

ARGUMENTS
       Tk_Window tkwin (in)	     Token for window.

       int *xPtr (out)		     Pointer to location in which to store root-window x-coordinate corresponding to left edge of tkwin's border.

       int *yPtr (out)		     Pointer to location in which to store root-window y-coordinate corresponding to top edge of tkwin's border.
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DESCRIPTION
       This procedure scans through the structural information maintained by Tk to compute the root-window coordinates corresponding to the upper-
       left corner of tkwin's border.  If tkwin has no border, then Tk_GetRootCoords returns the root-window coordinates corresponding to location
       (0,0) in tkwin.	Tk_GetRootCoords is relatively efficient, since it does not have to communicate with the X server.

KEYWORDS
       coordinates, root window

Tk															       Tk_GetRootCoords(3)