Creating a cell library from shared cells in a DGN file or blocks in a DWG file
The keyin EXPORT CELLS SHARED [destinationCellLibraryName] in MicroStation provides this ability.
For example, to export all the shared cells in the current file to a file called blockCellLibrary.cel, use:EXPORT CELLS SHARED c:\myDgns\blockCellLibrary.celThis keyin can be used in conjunction with Utilities > Batch Process to rapidly convert all the shared cells in one or more files into a single cell library.
Please refer to MicroStation's online documentation for more information on Batch Process.