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+'\"
+'\" Copyright (c) 1990-1994 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: @(#) tkvars.n 1.22 96/08/27 13:21:38
+'\" 
+.so man.macros
+.TH tkvars n 4.1 Tk "Tk Built-In Commands"
+.BS
+'\" Note:  do not modify the .SH NAME line immediately below!
+.SH NAME
+tkvars \- Variables used or set by Tk
+.BE
+
+.SH DESCRIPTION
+.PP
+The following Tcl variables are either set or used by Tk at various times
+in its execution:
+.TP 15
+\fBtk_library\fR
+This variable holds the file name for a directory containing a library
+of Tcl scripts related to Tk.  These scripts include an initialization
+file that is normally processed whenever a Tk application starts up,
+plus other files containing procedures that implement default behaviors
+for widgets.
+The initial value of \fBtcl_library\fR is set when Tk is added to
+an interpreter;  this is done by searching several different directories
+until one is found that contains an appropriate Tk startup script.
+If the \fBTK_LIBRARY\fR environment variable exists, then
+the directory it names is checked first.
+If \fBTK_LIBRARY\fR isn't set or doesn't refer to an appropriate
+directory, then Tk checks several other directories based on a
+compiled-in default location, the location of the Tcl library directory,
+the location of the binary containing the application, and the current
+working directory.
+The variable can be modified by an application to switch to a different
+library.
+.TP
+\fBtk_patchLevel\fR
+Contains a decimal integer giving the current patch level for Tk.
+The patch level is incremented for each new release or patch, and
+it uniquely identifies an official version of Tk.
+.TP
+\fBtkPriv\fR
+This variable is an array containing several pieces of information
+that are private to Tk.  The elements of \fBtkPriv\fR are used by
+Tk library procedures and default bindings.
+They should not be accessed by any code outside Tk.
+.TP
+\fBtk_strictMotif\fR
+This variable is set to zero by default.
+If an application sets it to one, then Tk attempts to adhere as
+closely as possible to Motif look-and-feel standards.
+For example, active elements such as buttons and scrollbar
+sliders will not change color when the pointer passes over them.
+.TP 15
+\fBtk_version\fR
+Tk sets this variable in the interpreter for each application.
+The variable holds the current version number of the Tk
+library in the form \fImajor\fR.\fIminor\fR.  \fIMajor\fR and
+\fIminor\fR are integers.  The major version number increases in
+any Tk release that includes changes that are not backward compatible
+(i.e. whenever existing Tk applications and scripts may have to change to
+work with the new release).  The minor version number increases with
+each new release of Tk, except that it resets to zero whenever the
+major version number changes.
+
+.SH KEYWORDS
+variables, version