[This is preliminary documentation and subject to change.]
Each migration DLL is copied to a unique working directory. Your migration DLL may store private Windows 95 and Windows 98 configuration information in this directory as well as other run-time or data files required for the migration.
This directory is the only location to which your migration DLL should write when it is running on Windows 95 and Windows 98. Setup deletes this working directory after all migration DLLs have completed and after Windows NT is successfully installed.