Provided by: tk8.5-doc_8.5.19-1ubuntu1_all 

NAME
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.
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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.
KEYWORDS
X window id
Tk 4.0 Tk_IdToWindow(3tk)