The classname for the OpenLink Single-Tier OLE DB Bridge Provider for ODBC, also known as the OLE DB-to-ODBC Bridge, is OpenLinkODBC.
The Provider is invoked using a connection string resembling this one --
Provider=OpenLinkODBC;Data Source=w2ks2;User ID=SCOTT;Password=tiger;Extended Properties="Cursors=Driver;BookmarkDefault=On";