TkSetClass(3) Tk Library Procedures TkSetClass(3)

NAME
       TkSetClass, TkClass - set or retrieve a window's class

SYNOPSIS
       ##iinncclluuddee <>

       TTkkSSeettCCllaassss(tkwin, class)

       TkUid
       TTkkCCllaassss(tkwin)

AARRGGUUMMEENNTTSS
       TkWindow   tkwin    (in)      Token for window.

       char        *class   (in)      New class name for window.



DESCRIPTION
       TTkkSSeettCCllaassss  is  called  to associate a class with a particular window.
       The class string identifies the type of the window;  all  windows  with
       the same general class of behavior (button, menu, etc.) should have the
       same class.  By convention all class names start with a capital letter,
       and there exists a Tcl command with the same name as each class (except
       all in lower-case) which can be used to create and  manipulate  windows
       of that class.  A window's class string is initialized to NULL when the
       window is created.

       For main windows, Tk automatically propagates the name and class to the
       WMCLASS  property used by window managers.  This happens either when a
       main window is actually created (e.g. in TTkkMMaakkeeWWiinnddoowwEExxiisstt),  or  when
       TTkkSSeettCCllaassss  is  called,  whichever occurs later.  If a main window has
       not been assigned a class then Tk will not set  the  WMCLASS  property
       for the window.

       TTkkCCllaassss  is  a  macro that returns the current value of tkwin's class.
       The value is returned as a TkUid, which may be used just like a string
       pointer  but  also  has  the properties of a unique identifier (see the
       manual entry for TTkkGGeettUUiidd for details).  If tkwin  has  not  yet  been
       given a class, then TTkkCCllaassss will return NULL.


KKEEYYWWOORRDDSS
       class, unique identifier, window, window manager



Tk                                                              TkSetClass(3)