Header file: MapArxApi.h.
When you edit objects in a project, your changes are saved to the project file (DWG file) by default. You can also use a save set to save changes back to their source drawings. The save set enables users to make changes to their drawings persistent.
The AcMapSaveSet class is used to create a save set, which contains the drawing database identifiers of the drawing objects whose changes are saved back to their source drawing files.
A project has a single save set. Create a save set with the AcMapProject::GetSaveSet function.
Do not subclass from this class.
During an edit session in a network environment, where the administrator has set the object locking preference, AutoCAD Map locks those objects in source drawing files that are specified in a save set so that other users cannot modify the objects.