Tk_GetRootCoords - Compute root-window coordinates of window

       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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       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.

       coordinates, root window

Tk                                                                                         Tk_GetRootCoords(3tk)

       Tk_GetRootCoords - Compute root-window coordinates of window

#include<tk.h>Tk_GetRootCoords(tkwin,xPtr,yPtr)