Microsoft's Data Access Object (DAO) Engine for versions of Access 2.0 and later is the part of the Microsoft Access Database Management System that actually handles your database data. As a user, you usually do not work directly with the DAO engine. It acts as a gateway through which Access data is made available to applications. Since the DAO engine is so closely tied to Access data, Crystal Reports considers it a part of the actual database.
DAO uses Microsoft's Object Linking and Embedding (OLE) technology (installed with Windows 95, Windows 98, and Windows NT) to provide access to Access data through an object
In addition to Access database tables, Crystal Reports can open and use Access queries through DAO. If you are not familiar with Access queries, refer to your Access documentation. See also Opening Access queries through DAO.
To translate information and data to and from DAO, the Report Designer uses the DAO translation files P2bdao.dll, P2ctdao.dll, and P2irdao.dll.
If you will be using secured Access databases, the SystemDB parameter in the Windows Registry database must be set to point at the path where the System.mda or System.mdw (Access 95) file is located. On Windows 95, Windows 98, and Windows NT systems, the SystemDB parameter is located in the following Registry key:
\\HKEY_LOCAL_MACHINE\SOFTWARE\Seagate Software\Jet\3.0\ Engines\Jet
Crystal Reports includes a utility called Sysdb32.exe to take care of setting this parameter for you. Simply run the appropriate utility and point it at the location of the System.mda or System.mdw file.
Seagate Software IMG Holdings, Inc. http://www.seagatesoftware.com Support services: http://support.seagatesoftware.com |