tkvars(3tk)						       Tk Built-In Commands						       tkvars(3tk)

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NAME

       tkvars - Variables used or set by Tk
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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 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  proce-
		      dures  that  implement default behaviors for widgets.  The initial value of tcl_library is set when Tk is added to an inter-
		      preter;  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  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 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 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  possi-
		      ble  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_textRedraw

       tk_textRelayout
		      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.

       tk_version     Tk  sets	this  variable	in  the interpreter for each application.  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 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.

KEYWORDS

       variables, version, text

Tk									4.1							       tkvars(3tk)