This topic provides information about how the different technologies compare with regard to Available Information.

Technology	Where can I find developer-focused information about the technology?
Active Directory Services Interfaces (ADSI)	Numerous third-party Web sites and books exist, and Microsoft provides ADSI and Active Directory information on the MSDN Web site .
Collaboration Data Objects for Windows 2000 (CDOSYS)	CDOSYS is covered in several Microsoft and third-party books. For more information about CDOSYS, see About CDO for Windows 2000 .
CDOSYS SMTP/NNTP Event Sinks	CDOSYS is covered in several Microsoft and third-party books. For more information about CDOSYS, see About CDO for Windows 2000 .
Collaboration Data Objects for Exchange 2000 Server (CDOEX)	Microsoft and third-party books are available that describe programming for Exchange by using CDOEX. In addition, CDOEX is documented in the Exchange 2000 Server SDK and the Exchange Server 2003 SDK. Use the documentation appropriate to the version of Exchange that you are developing for. Both SDKs are available on the Exchange Developer Center .
Collaboration Data Objects for Exchange Management (CDOEXM)	Microsoft and third-party books are available that describe programming for Exchange by using CDOEXM. In addition, CDOEXM is documented in the Exchange 2000 Server SDK and the Exchange Server 2003 SDK. Use the documentation appropriate to the version of Exchange that you are developing for. Both SDKs are available on the Exchange Developer Center .
Collaboration Data Objects for Exchange Workflow (CDOWF)	Some Microsoft and third-party books describe CDOWF. In addition, CDOWF is documented in the Exchange 2000 Server SDK and the Exchange Server 2003 SDK. Use the documentation appropriate to the version of Exchange that you are developing for. Both SDKs are available on the Exchange Developer Center .
Exchange OLE DB Provider (ExOLEDB)	ExOLEDB is discussed in some Microsoft and third-party Exchange development books. It is also described in the Exchange Server 2003 SDK and in the Exchange 2000 Server SDK. Use the documentation appropriate to the version of Exchange that you are developing for. Both SDKs are available on the Exchange Developer Center .
Exchange Store Event Sinks	Exchange store events are discussed in some Microsoft and third-party Exchange development books. They are also described in the Exchange Server 2003 SDK and in the Exchange 2000 Server SDK. Use the documentation appropriate to the version of Exchange that you are developing for. Both SDKs are available on the Exchange Developer Center .
Exchange Web Forms	Extending Microsoft Outlook® Web Access by using Exchange Web forms is discussed in the Exchange Server 2003 SDK and in the Exchange 2000 Server SDK. Use the documentation appropriate to the version of Exchange that you are developing for. Both SDKs are available on the Exchange Developer Center .
HTTP/Web Distributed Authoring and Versioning (WebDAV)	Because HTTP and WebDAV programming can be done within so many programming environments, there is a great deal of information about it. Using WebDAV to access Exchange information is discussed in both Microsoft and third-party books. In addition, using WebDAV to access Exchange information is described in both the Exchange 2000 Server SDK and in the Exchange Server 2003 SDK. Use the documentation appropriate to the version of Exchange that you are developing for. Both SDKs are available on the Exchange Developer Center .
WebDAV Notifications	Exchange WebDAV notifications are documented in the Exchange 2000 Server SDK and in the Exchange Server 2003 SDK. Use the documentation appropriate to the version of Exchange that you are developing with. Both SDKs are available on the Exchange Developer Center .
Incremental Change Synchronization (ICS)	Both Microsoft and third-party books that describe MAPI programming are available. Information about ICS is available in the Exchange 5.5 SDK. In addition, MAPI and ICS developer documentation is available on the MSDN Web site .
Lightweight Directory Access Protocol (LDAP)	Numerous third-party Web sites and books exist, and Microsoft provides LDAP, ADSI, and Active Directory information on the MSDN Web site .
Messaging Application Programming Interface (MAPI)	Both Microsoft and third-party books that describe MAPI programming are available. In addition, MAPI developer documentation is available on the the MSDN Web site
Outlook Object Model (OOM)	Information about programming by using OOM is available in both Microsoft and third-party books. For more information about OOM, see Microsoft Outlook Objects .
Outlook Web Access	Little or no information is available about customizing Outlook Web Access or reusing Outlook Web Access components and commands.
Exchange Rules	Information about using Exchange rules is available in the Exchange 5.5 SDK on the MSDN Web site .
SMTP Event Sinks	For information about developing by using SMTP event sinks, see SMTP Server  on MSDN.
Windows Management Instrumentation (WMI) providers for Exchange	Creating applications and scripts that use WMI is discussed in Microsoft and third-party books, and in the WMI SDK. For more information about WMI, see Windows Management Instrumentation  on MSDN.
Exchange Backup and Restore API	Documentation for the Exchange Backup and Restore API is provided in the Exchange 2000 Server SDK and in the Exchange Server 2003 SDK. Both SDKs are available on the Exchange Developer Center .
Exchange writer for the Windows Volume Shadow Copy Service	For information about VSS, see the Exchange Server 2003 SDK and Windows Development  on MSDN.