2.2.1.2 Datatype Identifiers
Datatype identifiers are 2-byte values that specify the exact type and encoding format of data as follows:<11>
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VTDataType = VT-EMPTY / VT-NULL / VT-I2 / VT-I4 / VT-R4 / VT-R8 / VT-CY / VT-DATE / VT-BSTR / VT-DISPATCH / VT-ERROR / VT-BOOL / VT-UNKNOWN / VT-DECIMAL / VT-UI1 / VT-ARRAY-EMPTY / VT-ARRAY-NULL / VT-ARRAY-I2 / VT-ARRAY-I4 / VT-ARRAY-R4 / VT-ARRAY-R8 / VT-ARRAY-CY / VT-ARRAY-DATE / VT-ARRAY-BSTR / VT-ARRAY-DISPATCH / VT-ARRAY-ERROR / VT-ARRAY-BOOL / VT-ARRAY-VARIANT / VT-ARRAY-UNKNOWN / VT-ARRAY-UI1 / DBTYPE-I1 / DBTYPE-UI2 / DBTYPE-UI4 / DBTYPE-I8 / DBTYPE-UI8 / DBTYPE-FILETIME / DBTYPE-GUID / DBTYPE-BYTES / DBTYPE-STR / DBTYPE-WSTR / DBTYPE-DBDATE / DBTYPE-DBTIME / DBTYPE-DBTIMESTAMP / DBTYPE-VARNUMERIC VT-EMPTY = %x00.00 VT-NULL = %x01.00 VT-I2 = %x02.00 VT-I4 = %x03.00 VT-R4 = %x04.00 VT-R8 = %x05.00 VT-CY = %x06.00 VT-DATE = %x07.00 VT-BSTR = %x08.00 VT-DISPATCH = %x09.00 VT-ERROR = %x0A.00 VT-BOOL = %x0B.00 VT-UNKNOWN = %x0D.00 VT-DECIMAL = %x0E.00 VT-UI1 = %x11.00 VT-UI4 = %x19.00 VT-UI8 = %x21.00
The following constants indicate array types:
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VT-ARRAY-EMPTY = %x00.20 VT-ARRAY-NULL = %x01.20 VT-ARRAY-I2 = %x02.20 VT-ARRAY-I4 = %x03.20 VT-ARRAY-R4 = %x04.20 VT-ARRAY-R8 = %x05.20 VT-ARRAY-CY = %x06.20 VT-ARRAY-DATE = %x07.20 VT-ARRAY-BSTR = %x08.20 VT-ARRAY-DISPATCH = %x09.20 VT-ARRAY-ERROR = %x0A.20 VT-ARRAY-BOOL = %x0B.20 VT-ARRAY-VARIANT = %x0C.20 VT-ARRAY-UNKNOWN = %x0D.20 VT-ARRAY-UI1 = %x11.20
The following constants are used for database communication:
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DBTYPE-I1 = %x10.00 DBTYPE-UI2 = %x12.00 DBTYPE-UI4 = %x13.00 DBTYPE-I8 = %x14.00 DBTYPE-UI8 = %x15.00 DBTYPE-FILETIME = %x40.00 DBTYPE-GUID = %x48.00 DBTYPE-BYTES = %x80.00 DBTYPE-STR = %x81.00 DBTYPE-WSTR = %x82.00 DBTYPE-DBDATE = %x85.00 DBTYPE-DBTIME = %x86.00 DBTYPE-DBTIMESTAMP = %x87.00 DBTYPE-VARNUMERIC = %x8B.00