status.i4.v = hilite_update_c(hilite_id.i2.v)

	This routine will update a highlighting region on the TV screen
	which was created by an earlier call to hilite_create_c.  If
	the present cursor position lies within the highlighting region,
	the field associated with that region will be highlighted and
	any previously highlighted field in that highlighting region
	will be unhighlighted.

	hilite_id	highlighting ID returned from hilite_create_c

	This function returns ACNET status values as follows:

	OK			success
	CBS_NO_SUCH		couldn't find the requested highlight region
	CBS_NOTENB		couldn't write to window or updates are
				presently suspended

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	hilite_create_c, hilite_simple_row_create_c, hilite_suspend_c,
	hilite_resume_c, hilite_delete_c, hilite_window_delete_c,
	window_hilite_c, window_hilite_line_c, hilite_modify_save_buffer_c

	C/C++ usage:

	short	hilite_id;
	int	status;

	status = hilite_update_c(hilite_id);