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tkvars(n)		     Tk	Built-In Commands		     tkvars(n)


       geometry, tk_library, tk_patchLevel, tk_strictMotif, tk_version - Vari-
       ables used or set by Tk

       The following Tcl variables are either set or used  by  Tk  at  various
       times in	its execution:

       tk_library     This  variable  holds the	file name for a	directory con-
		      taining 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 tk_library 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	TK_LIBRARY en-
		      vironment	variable exists, then the directory  it	 names
		      is  checked first.  If TK_LIBRARY	is not set or does not
		      refer to an appropriate directory, then Tk  checks  sev-
		      eral  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.

       tk_patchLevel  Contains	a  dot-separated  sequence of decimal integers
		      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.

		      This value is normally the same as the result of	"pack-
		      age require Tk".

       tk_strictMotif This variable is set to zero by default.	If an applica-
		      tion 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 scroll-
		      bar  sliders  will  not  change  color  when the pointer
		      passes over them.	 Modern	applications should  not  nor-
		      mally set	this variable.

       tk_version     Tk sets this variable in the interpreter for each	appli-
		      cation.  The variable holds the current  version	number
		      of  the  Tk  library in the form major.minor.  Major and
		      minor are	integers.  The major version number  increases
		      in  any  Tk  release  that includes changes that are not
		      backward compatible (i.e.	whenever existing Tk  applica-
		      tions  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.

       These variables should not normally be set by user code.

	      This variable is an array	containing several pieces of  informa-
	      tion  that are private to	Tk.  The elements of tk::Priv are used
	      by Tk library procedures and default bindings.  They should  not
	      be accessed by any code outside Tk.


	      These variables are set by text widgets when they	have debugging
	      turned on.  The values written to	these variables	can be used to
	      test  or	debug  text  widget  operations.   These variables are
	      mostly used by Tk's test suite.

       The following variables are only	guaranteed to exist in	wish  executa-
       bles;  the  Tk library does not define them itself but many Tk environ-
       ments do.

	     If	set, contains the user-supplied	geometry specification to  use
	     for the main Tk window.

       package(n), tclvars(n), wish(1)

       environment, text, variables, version

Tk				      4.1			     tkvars(n)


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