Tk_IdToWindow - Find Tk's window information for an X window
SYNOPSIS
#include <tk.h>
Tk_Window
Tk_IdToWindow(display, window)
ARGUMENTS
Display *display (in)
X display containing the window.
Window window (in)
X id for window.
DESCRIPTION
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.