Tk_Class man page on BSDOS

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Tk_SetClass(3)	      Tk Library Procedures	   Tk_SetClass(3)

_________________________________________________________________

NAME
       Tk_SetClass, Tk_Class - set or retrieve a window's class

SYNOPSIS
       #include <tk.h>

       Tk_SetClass(tkwin, class)

       Tk_Uid
       Tk_Class(tkwin)

ARGUMENTS
       Tk_Window   tkwin    (in)      Token for window.

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

DESCRIPTION
       Tk_SetClass is called to associate a class with a particu-
       lar  window.   The class string identifies the type of the
       window;	all windows with the same general class of behav-
       ior  (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 cre-
       ate  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 WM_CLASS property used  by	window	managers.
       This happens either when a main window is actually created
       (e.g.  in  Tk_MakeWindowExist),	or  when  Tk_SetClass  is
       called,	whichever occurs later.	 If a main window has not
       been assigned a class then Tk will not  set  the	 WM_CLASS
       property for the window.

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

KEYWORDS
       class, unique identifier, window, window manager

Tk								1

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