NAME

       Tk_Main - main program for Tk-based applications

SYNOPSIS

       #include <tk.h>

       Tk_Main(argc, argv, appInitProc)

ARGUMENTS

       int argc (in)                              Number of elements in argv.

       char *argv[] (in)                          Array   of   strings   containing  command-line
                                                  arguments. On Windows,  when  using  -DUNICODE,
                                                  the parameter type changes to wchar_t *.

       Tcl_AppInitProc *appInitProc (in)          Address      of     an     application-specific
                                                  initialization procedure.  The value  for  this
                                                  argument is usually Tcl_AppInit.
_________________________________________________________________________________________________

DESCRIPTION

       Tk_Main  acts as the main program for most Tk-based applications.  Starting with Tk 4.0 it
       is not called main anymore because it is part of the Tk library and having a function main
       in a library (particularly a shared library) causes problems on many systems.  Having main
       in the Tk library would also make it hard to use Tk in C++ programs,  since  C++  programs
       must have special C++ main functions.

       Normally  each  application  contains  a  small main function that does nothing but invoke
       Tk_Main.  Tk_Main then does all the work of creating and running a wish-like application.

       When it is has finished its own initialization, but before it processes commands,  Tk_Main
       calls  the  procedure given by the appInitProc argument.  This procedure provides a “hook”
       for the application to perform its  own  initialization,  such  as  defining  application-
       specific   commands.   The  procedure  must  have  an  interface  that  matches  the  type
       Tcl_AppInitProc:
              typedef int Tcl_AppInitProc(
                      Tcl_Interp *interp);
       AppInitProc is almost always a pointer to Tcl_AppInit; for more details on this procedure,
       see the documentation for Tcl_AppInit.

       Tk_Main  functions  much  the  same  as Tcl_Main.  In particular, Tk_Main supports both an
       interactive mode and a startup script mode, with the file name and encoding of  a  startup
       script  under  the  control of the Tcl_SetStartupScript and Tcl_GetStartupScript routines.
       However it calls Tk_MainLoop after processing any supplied script, and in interactive uses
       events registered with Tcl_CreateFileHandler to process user input.

SEE ALSO

       Tcl_DoOneEvent(3tk)

KEYWORDS

       application-specific initialization, command-line arguments, main program