McAddInData is a component object model based application programming interface (API) for database programmers.  The API extends the generic McDBLib  database API and database structure for the application.  Since this functionality does not override or inherit the functionality of McDBLib, a programmer may need to use both APIs.  It is suggested to search this Utility API for extended functionality before using a lower level McDBLib functionality.  This add-in exposes its object model in the application object model as ‘Application.DataManager'.   Unlike many add-ins, McAddInData does not alter the user-interface of the attached application.  It does supply various database related functionalities including:

• McDataManager Utilities: A high level database utility API with specific functions to aid in using McDBLib in the McAddInData context.
• McDataNodes : Persistent database object selections and an API exposing the operations that may be performed on the objects.
• McDataJournal : Semi-persistent historic data cache.
• McDataLink : An extended and simplified ShellLink Object.
• McDataSource : An object that enables COM servers to be registered and created to support McDataNodes  operations on unknown sources of data stored in COM objects, files, clipboard/dataobject, and database objects.
• Two implementations of a McDataSource server: A McImage and McFile database object server.

McAddInData component object model interface is designed for two different types of programmers.   The first type of programmer would be a user or OEM automating useful tasks through the object model's McDataNodes , McDataJournal  and McDataManager  Utility.  The second type of user could register (McDataSources ) and create a McDataHandler server that could be used to expand the command set and data formats supported by the McDataNodes  objects.

McAddInData.dll is needed and it is installed by the application installation process.   McAddInData relies on several standard DLLs that are shipped with the application most notably the database DLLs.  It requires Microsoft’s scrrun.dll, msaddndr.dll, apc63.dll and comdlg32.ocx.  McAddInData also uses a set of .loc files to perform user-interface translations (McAddInData.loc, McDataHandlerFile.loc, McDataHandlerImage.loc ).  There is no licensing requirement for this functionality.

McDBLib   - The Database Engine.