Sub MFExternalCreate( _
   ByVal _gCLassID As Guid, _
   ByRef _ppObj As Object, _
   ByRef _pdwProcessID As UInteger, _
   ByVal _bsProps As String _
) 

void MFExternalCreate( 
   Guid _gCLassID,
   out object _ppObj,
   out uint _pdwProcessID,
   string _bsProps
)

procedure MFExternalCreate( 
    _gCLassID: Guid;
   Out  _ppObj: TObject;
   Out  _pdwProcessID: LongWord;
    _bsProps: String
); 

void MFExternalCreate( 
   Guid _gCLassID,
   [PARAMFLAG::Out] IUnknown* _ppObj,
   [PARAMFLAG::Out] uint _pdwProcessID,
   BSTR* _bsProps
) 

Parameters

_gCLassID

GUID of an object. For example, "{0F56D2E7-033C-4A05-BCDA-DF58C9BBF06F}" for Character Generator

_ppObj

output object that you can use for further control in your application

_pdwProcessID

process ID that you need to control the process

_bsProps

additional properties (reserved for future usage)

Reference

IMFCreator Interface
IMFCreator Members