Tk_DrawFocusHighlight - draw the traversal highlight ring for a widget
SYNOPSIS
#include <tk.h>
Tk_GetPixels(tkwin, gc, width, drawable)
ARGUMENTS
-  Tk_Window		tkwin		(in)
-  Window for which the highlight is being drawn.  Used to retrieve
the window's dimensions, among other things.
-  GC		gc		(in)
-  Graphics context to use for drawing the highlight.
-  int		width		(in)
-  Width of the highlight ring, in pixels.
-  Drawable		drawable		(in)
-  Drawable in which to draw the highlight;  usually an offscreen
pixmap for double buffering.
DESCRIPTION
Tk_DrawFocusHighlight is a utility procedure that draws the
traversal highlight ring for a widget.
It is typically invoked by widgets during redisplay.
KEYWORDS
focus, traversal highlight