ProjectWise Server - User customized modules

On the server side (ProjectWise Integration Server). In C:\Program Files\Bentley\ProjectWise\Bin\dmskrnl.cfg there is a section for plugins or server customizations. It looks like this:

[UserModules]
; -----------------------------------------------------------
; Section provides user customized modules
; -----------------------------------------------------------

;  On start up the server will read this section and load any listed DLLs.
;  The dll is not unloaded until the server is shut down.

;dmsgeosrv=dmsgeosrv.dll
;EventLogging=EventLoggingATP.dll
;drmsvcsrv=drmsvcsrv.dll

Does anyone know how to write a server plugin or what can be done using a server plugin?