Tk_IdToWindow - Find Tk's window information for an X window
#include <tk.h>
Tk_Window
Tk_IdToWindow(display, window)
Display *display (in) X display containing the
window.
Window window (in) X id for window.
Given an X window identifier and the X display it
corresponds to, this procedure returns the corresponding
Tk_Window handle. If there is no Tk_Window corresponding to
window then NULL is returned.
X window id