tk_mainloop(3) mojave man page | unix.com

Tk_MainLoop(3)						       Tk Library Procedures						    Tk_MainLoop(3)

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NAME
       Tk_MainLoop - loop for events until all windows are deleted

SYNOPSIS
       #include <tk.h>

       Tk_MainLoop()
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DESCRIPTION
       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.

KEYWORDS
       application, event, main loop

Tk																    Tk_MainLoop(3)