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

______________________________________________________________________________

NAME
       tkvars - Variables used or set by Tk
_________________________________________________________________

DESCRIPTION
       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 tcl_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 environment 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 several other directories based on a com‐
		      piled-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  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.

       tk::Priv	      This variable is an array containing several  pieces  of
		      information  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 out‐
		      side 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.

       tk_textRedraw

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

       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.

KEYWORDS
       variables, version, text

Tk				      4.1			     tkvars(n)
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