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


       tkvars - Variables used or set by Tk

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

       tk_library     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 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 environ-
		      ment  variable  exists,  then  the directory it names is checked first.  If
		      TK_LIBRARY 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  con-
		      taining  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.

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

       tk_strictMotif 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.

       tk_version     Tk  sets	this variable in the interpreter for each application.	The vari-
		      able 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 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.

       variables, version

Tk					       4.1					tkvars(n)
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