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Tk_Main(3) Tk Library Procedures Tk_Main(3)
Tk_Main - main program for Tk-based applications
Tk_Main(argc, argv, appInitProc)
int argc (in) Number of elements in argv.
char *argv (in) Array of strings containing command-line argu-
Tcl_AppInitProc *appInitProc (in) Address of an application-specific initializa-
tion procedure. The value for this argument is
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-spe-
cific commands. The procedure must have an interface that matches the type Tcl_AppInit-
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.
application-specific initialization, command-line arguments, main program
Tk 4.0 Tk_Main(3)
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