Tk_MainLoop - Man Page

#include <tk.h>

Tk_MainLoop()

Tk_MainLoop is a procedure that loops repeatedly calling Tcl_DoOneEvent.  It returns only when there are no applications left in this process (i.e. no main windows exist anymore).  Most windowing applications will call Tk_MainLoop after initialization; the main execution of the application will consist entirely of callbacks invoked via Tcl_DoOneEvent.

application, event, main loop

wish(1).