ConstReadonlyUnspecified: 0The type of the property is unspecified.
ReadonlyNull: 1The property has a null value.
ReadonlyI2: 2The property has a signed 16-bit value.
ReadonlyLong: 3The property has a signed 32-bit value.
ReadonlyR4: 4The property has a 32-bit floating point value.
ReadonlyDouble: 5The property has a 64-bit floating point value.
ReadonlyCurrency: 6The property has a 64-bit integer value representing 1/10000th of a monetary unit (i.e., 1/100th of a cent).
ReadonlyAppTime: 7The property has a 64-bit integer value specifying the number of 100ns periods since Jan 1, 1601.
ReadonlyError: 10The property has a 32-bit error value.
ReadonlyBoolean: 11The property has a boolean value.
ReadonlyObject: 13The property has an embedded object value.
ReadonlyI8: 20The property has a signed 64-bit value.
ReadonlyString8: 30The property has a null-terminated 8-bit character string value.
ReadonlyUnicode: 31The property has a null-terminated unicode character string value.
ReadonlySysTime: 64The property has a 64-bit integer value specifying the number of 100ns periods since Jan 1, 1601.
ReadonlyClassId: 72The property has an OLE GUID value.
ReadonlyBinary: 258The property has a binary blob value.
ReadonlyMultiValued: 4096A flag indicating that the property contains multiple values.
The type of value that a TNEF property contains.