def dw_WriteBoundData(fname, areas):
    """ 
    writes B5\\_bounddata.inc
    """
    areas = sorted(areas, reverse=True)
    exfile = open(fname, 'w')
    print(';Written by dw_WriteBoundData', file=exfile)
    for i in areas:
        print("ITEM 'Area_%s'" % i, file=exfile)
        print("CONCENTRATION  'Area_%s' 'Check' 'Initial'" % i, file=exfile)
        print('DATA', file=exfile)
        print('1.0  1.0  0.0', file=exfile)
        print('', file=exfile)
    exfile.close()
