This property specifies the data type, or an empty string (""), of the column.
Syntax
IColumn.Type
Remarks
The Type property can be an empty string, or one of the values in the following table.
| Type | Description |
| VT_I1 | Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires 0x before the number, for example, 0x3F8. |
| VT_UI1 | Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires 0x before the number. |
| VT_I2 | Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires 0x before the number. |
| VT_UI2 | Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires 0x before the number. |
| VT_I4 | Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires 0x before the number. |
| VT_UI4 | Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires 0x before the number. |
| VT_I8 | Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires 0x before the number. |
| VT_UI8 | Integer. Expressed in either decimal (base 10) or hexadecimal (base 16) notation. The latter requires 0x before the number. |
| VT_R4 | Real number. Can be expressed in scientific notation. |
| VT_CY | Currency. Expressed as two integers, separated by a period, for example, 100.55. Cannot be preceded by $, ¥, £, and so on. This data type does not specify the currency format. |
| VT_BOOL | Boolean. Expressed as TRUE or FALSE. |
| VT_LPSTR | String. Any input accepted. |
| VT_LPWSTR | Unicode string. Any input accepted. |
| VT_BSTR | Basic string. Any input accepted. |
| VT_CLSID | GUID (Globally Unique Identifier). Expressed as xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. |
| VT_VECTOR | Vector properties are fully supported. |
| VT_DATE | Date expressed as an absolute in two forms: yyyy/mm/dd and yyyy/mm/dd hh:mm:ss. Also expressed as a relative date: -#y, -#m, -#w, -#d, -#h, -#n, -#s where the letters correspond to year, month, week, day, hour, minute and second, respectively. Positive relative dates into the future are not supported. |
| VT_FILETIME | Date expressed as an absolute in two forms: yyyy/mm/dd and yyyy/mm/dd hh:mm:ss. Also expressed as a relative date: -#y, -#m, -#w, -#d, -#h, -#n, -#s where the letters correspond to year, month, week, day, hour, minute and second, respectively. Positive relative dates into the future are not supported. |
Type is optional. You need not set it to function correctly with any value type returned by a filter. If you don't know the type of a property emitted by the indexing filter, or if the filter or filters for a property do not always emit the same value type, don't set Type. If Type is specified, it must match the value emitted by the filter, otherwise the value is discarded and not indexed.
Example
See Creating_and_Accessing IColumn Interface Objects.
See Also