Public Overridable Sub ReaderRegisterExtensions( _
   ByVal _bRegister As Integer, _
   ByVal _bsExtensionsList As String _
) 

public virtual void ReaderRegisterExtensions( 
   int _bRegister,
   string _bsExtensionsList
)

public procedure ReaderRegisterExtensions( 
    _bRegister: Integer;
    _bsExtensionsList: String
); virtual; 

public: virtual void ReaderRegisterExtensions( 
   int _bRegister,
   BSTR* _bsExtensionsList
) 

Parameters

_bRegister

register (1) - unregister (0) an extension

_bsExtensionsList

list of extensions

Reference

MFReaderDSClass Class
MFReaderDSClass Members