Installing ATL Database Support
Setup installs all the necessary components to support OLE DB programming as part of the baseline installation. The OLE DB interfaces are installed as part of the MDAC SDK. The OLE DB templates, which support OLE DB programming in Visual C++ .NET, are installed as part of the ATL library. Visual C++ .NET Setup installs both the MDAC SDK (version 2.8) and the ATL library.
See Also
Concepts
OLE DB Consumer Templates (C++)
OLE DB Provider Templates (C++)