Tk_MainWindow - find the main window for an application

#include <tk.h>

Tk_Window Tk_MainWindow(interp)

Tcl_Interp *interp (in/out)

Interpreter associated with the application.

If interp is associated with a Tk application then Tk_MainWindow returns the application's main window. If there is no Tk application associated with interp then Tk_MainWindow returns NULL and leaves an error message in interp->result.

application, main window