ADO SQL Ranging Dialect
When using the ActiveX Directory Objects (ADO), using the SQL dialect, single quotation marks (') must be used around the attribute and range specifier. The following is an example of the ADO SQL dialect.
Command.CommandText = "select Name, 'member;Range=0-50' from 'LDAP://CN=Group1,DC=Fabrikam,DC=Com' where objectCategory='group'"