TExprValueType = ( vtUndefined = 0, vtDoubleValue = 1, vtRangeValue = 2, vtString = 3, vtComplexValue = 4, vtVectorValue = 5, vtIntegerValue = 6, vtIntVectorValue = 7, vtIntMatrixValue = 8, vtBoolValue = 9, vtBoolVectorValue = 10, vtBoolMatrixValue = 11, vtMatrixValue = 12, vtStringListValue = 13, vtCustomValue = 14 );