HWND
Tk_GetHWND(window)
Window
Tk_AttachHWND(tkwin, hwnd)
Tk_GetHWND returns the Windows HWND identifier for X Windows window given by window.
Tk_AttachHWND binds the Windows HWND identifier to the specified Tk_Window given by tkwin. It returns an X Windows window that encapsulates the HWND.