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+'\"
+'\" Copyright (c) 1990 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: @(#) MainWin.3 1.5 96/03/26 18:15:15
+'\"
+.so man.macros
+.TH Tk_MainWindow 3 7.0 Tk "Tk Library Procedures"
+.BS
+.SH NAME
+Tk_MainWindow \- find the main window for an application
+.SH SYNOPSIS
+.nf
+\fB#include <tk.h>\fR
+.sp
+Tk_Window
+\fBTk_MainWindow\fR(\fIinterp\fR)
+.SH ARGUMENTS
+.AS Tcl_Interp *pathName
+.AP Tcl_Interp *interp in/out
+Interpreter associated with the application.
+.BE
+
+.SH DESCRIPTION
+.PP
+If \fIinterp\fR is associated with a Tk application then \fBTk_MainWindow\fR
+returns the application's main window.
+If there is no Tk application associated with \fIinterp\fR then
+\fBTk_MainWindow\fR returns NULL and leaves an error message
+in \fIinterp->result\fR.
+
+.SH KEYWORDS
+application, main window