1 files changed, 61 insertions, 0 deletions
diff --git a/doc/Tk_Main.3 b/doc/Tk_Main.3
new file mode 100644
index 0000000..7565aae
--- /dev/null
+++ b/doc/Tk_Main.3
@@ -0,0 +1,61 @@
+'\"
+'\" Copyright (c) 1994 The Regents of the University of California.
+'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
+'\"
+'\" See the file "license.terms" for information on usage and redistribution
+'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+'\" 
+'\" SCCS: @(#) Tk_Main.3 1.7 96/03/26 18:19:21
+'\" 
+.so man.macros
+.TH Tk_Main 3 4.0 Tk "Tk Library Procedures"
+.BS
+.SH NAME
+Tk_Main \- main program for Tk-based applications
+.SH SYNOPSIS
+.nf
+\fB#include <tk.h>\fR
+.sp
+\fBTk_Main\fR(\fIargc, argv, appInitProc\fR)
+.SH ARGUMENTS
+.AS Tcl_AppInitProc *appInitProc
+.AP int argc in
+Number of elements in \fIargv\fR.
+.AP char *argv[] in
+Array of strings containing command-line arguments.
+.AP Tcl_AppInitProc *appInitProc in
+Address of an application-specific initialization procedure.
+The value for this argument is usually \fBTcl_AppInit\fR.
+.BE
+
+.SH DESCRIPTION
+.PP
+\fBTk_Main\fR acts as the main program for most Tk-based applications.
+Starting with Tk 4.0 it is not called \fBmain\fR anymore because it 
+is part of the Tk library and having a function \fBmain\fR
+in a library (particularly a shared library) causes problems on many
+systems.
+Having \fBmain\fR in the Tk library would also make it hard to use
+Tk in C++ programs, since C++ programs must have special C++
+\fBmain\fR functions.
+.PP
+Normally each application contains a small \fBmain\fR function that does
+nothing but invoke \fBTk_Main\fR.
+\fBTk_Main\fR then does all the work of creating and running a
+\fBwish\fR-like application.
+.PP
+When it is has finished its own initialization, but before
+it processes commands, \fBTk_Main\fR calls the procedure given by
+the \fIappInitProc\fR 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 \fBTcl_AppInitProc\fR:
+.CS
+typedef int Tcl_AppInitProc(Tcl_Interp *\fIinterp\fR);
+.CE
+\fIAppInitProc\fR is almost always a pointer to \fBTcl_AppInit\fR;
+for more details on this procedure, see the documentation
+for \fBTcl_AppInit\fR.
+
+.SH KEYWORDS
+application-specific initialization, command-line arguments, main program