Tk_Main

Tk_Main(3)                   Tk Library Procedures                  Tk_Main(3)



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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.

       Tcl_AppInitProc   *appInitProc   (in)      Address  of  an application-
                                                  specific initialization pro-
                                                  cedure.   The value for this
                                                  argument     is      usually
                                                  Tcl_AppInit.
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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 argu-
       ment.  This procedure provides a ``hook'' for the application  to  per-
       form its own initialization, such as defining application-specific com-
       mands.  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.


KEYWORDS
       application-specific initialization, command-line arguments, main  pro-
       gram



Tk                                    4.0                           Tk_Main(3)