Sets or returns the default value of a CdbField object. For a CdbField object not yet appended to the Fields collection, this property is read/write (Microsoft Jet workspaces only).
Syntax
VOIDSetDefaultValue(LPCTSTR pstr );
CStringGetDefaultValue(VOID);
Parameters
| Type | Argument | Description |
| LPCTSTR | pstr | A pointer to a string that contains a maximum of 255 characters. It can be either text or an expression. If the property setting is an expression, it can't contain user-defined functions, Microsoft Jet database engine SQL aggregate functions, or references to queries, forms, or other CdbField objects. |
Remarks
The availability of the DefaultValue property depends on the object that contains the Fields collection, as shown in the following table.
| If the Fields collection belongs to a | Then DefaultValue is |
| CdbIndex object | Not supported |
| CdbQueryDef object | Read-only |
| CdbRecordset object | Read-only |
| CdbRelation object | Not supported |
| CdbTableDef object | Read/write |
When a new record is created, the DefaultValue property setting is automatically entered as the value for the field. You can change the field value by setting its Value property.
Note You can also set the DefaultValue property of a CdbField object on a CdbTableDef object to a special value called "GenUniqueID( )". This causes a random number to be assigned to this field whenever a new record is added or created, thereby giving each record a unique identifier. The field's Type property must be Long.
The DefaultValue property doesn't apply to AutoNumber and Long Binary fields.