status.i4.v = window_button_highlight_c(identifier.g.v)

	This routine will highlight a button which was created by an
	earlier call to window_button_create_c.

	identifier	identifier of desired button whose type depends on
			the most recent call to window_button_set_id_type_c
			(WINDOW_BUTTON_BY_ID -> use four byte ID value returned
						by a prior call to
			 WINDOW_BUTTON_BY_HANDLE -> use ASCII handle string)

	This function returns ACNET status values as follows:

	OK			success
	CBS_NO_SUCH		button does not exist
	CBS_DUPREQ		button was already highlighted

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	window_button_set_id_type_c, window_button_unhighlight_c,
	window_button_create_c, window_button_delete_c,
	window_button_text_to_id_c, window_button_enable_c,
	window_button_disable_c, intro_tv_windows

	C/C++ usage:

	int	status;
	int	button_id;

	status = window_button_highlight_c((void *) &button_id);