status.i4.v = menu_bar_field_coordinates_c(window_id.i2.v, field.i4.v,
						   row.i4.r, left_column.i4.r,

	This routine will return the coordinates for the requested
	menu bar field.  A value of NULL may be passed for any of
	the returned arguments if the corresponding value is not

	window_id	ID of desired window
	field		field number to change (starting at 1)
	row		returned row of field
	left column	returned left column of field
	field_length	returned length of field

	This function returns ACNET status values as follows:

	OK			success
	CBS_INVARG		invalid window ID
	CBS_NO_SUCH		no menu bar is present or no such field

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	menu_bar_create, window_menu_bar_create_c, window_menu_bar_delete_c,
	window_menu_bar_update_c, window_read_menu_bar_info,
	menu_bar_enable_c, menu_bar_disable_c, menu_bar_change_entry_c,
	menu_bar_dncase_entry_c, menu_bar_upcase_entry_c, window_has_menu_bar_c,

	C/C++ usage:

	short	window_id = WMNGR_BACKGROUND;
	int	status;
	int	field = 1;
	int	row;
	int	left_column;
	int	field_width;

	status = menu_bar_field_coordinates_c(window_id,field,&row,