The last two are loaded from the custom IDFs to help do deeper migrations.
C:\Program Files (x86)\GreatMigrations\gmStudio\support\rules\GM.MSCOMCTL.OCX.xml (1 hit)
Line 1906: <Refactor id="[GM.mscomctl.ocx]" dllName="MscomctlMigration.dll" event="mscomctl">
C:\Program Files (x86)\GreatMigrations\gmStudio\support\rules\GM.scrrun.dll.xml (1 hit)
Line 375: <Refactor id="[GM.scrrun.dll]" dllName="ScrrunMigration.dll" event="scrrun" >
They could probably be implemented using gmSl, but gmSL was not available when we implemented the DLLs, so the DLLs are still used.
The other DLLs are used for new, specialized, and undocumented features of the application.
GenericCollections.dll / locSubsystem.dll