The UnbindFromDatatype method breaks the binding between a Microsoft® SQL Server™ 2000 default or rule and a user-defined data type.
object.UnbindFromDatatype( Datatype , [ FutureOnly ] )
object
Expression that evaluates to an object in the Applies To list
Datatype
String that identifies an existing user-defined data type by name
FutureOnly
When TRUE, columns defined using the data type maintain the rule or default though the default no longer exhibits the behavior
HRESULT UnbindFromDatatype(
SQLDMO_LPCSTR Datatype,
BOOL bFutureOnly = FALSE);