enum DwgVersion { kDHL_MC0_0 = 0, kDHL_AC1_2 = 1, kDHL_AC1_40 = 2, kDHL_AC1_50 = 3, kDHL_AC2_20 = 4, kDHL_AC2_10 = 5, kDHL_AC2_21 = 6, kDHL_AC2_22 = 7, kDHL_1001 = 8, kDHL_1002 = 9, vAC025 = kDHL_1002, kDHL_1003 = 10, vAC026 = kDHL_1003, kDHL_1004 = 11, vAC09 = kDHL_1004, kDHL_1005 = 12, kDHL_1006 = 13, vAC10 = kDHL_1006, kDHL_1007 = 14, kDHL_1008 = 15, kDHL_1009 = 16, vAC12 = kDHL_1009, kDHL_1010 = 17, kDHL_1011 = 18, kDHL_1012 = 19, vAC13 = kDHL_1012, kDHL_1013 = 20, vAC14beta = kDHL_1013, kDHL_1014 = 21, vAC14 = kDHL_1014, kDHL_1500 = 22, kDHL_1015 = 23, vAC15 = kDHL_1015, kDHL_1800a = 24, kDHL_1800 = 25, vAC18 = kDHL_1800, kDHL_2100a = 26, kDHL_1021 = 27, vAC21 = kDHL_1021, kDHL_2400a = 28, kDHL_1024 = 29, vAC24 = kDHL_1024, kDHL_2700a = 30, kDHL_1027 = 31, vAC27 = kDHL_1027, kDHL_3200a = 32, kDHL_1032 = 33, vAC32 = kDHL_1032, kDHL_PRECURR = vAC27, kDHL_CURRENT = vAC32, kDHL_Unknown = 32766, kDHL_Max = 32767 };