Public Function BeginExtractData( _
   ByVal VersionName As String, _
   ByVal ReplicaDescription As GPReplicaDescription, _
   ByVal ExportOptions As GDSExportOptions, _
   ByVal TransportType As esriGDSTransportType, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As GeoDataServerProxy
Dim VersionName As String
Dim ReplicaDescription As GPReplicaDescription
Dim ExportOptions As GDSExportOptions
Dim TransportType As esriGDSTransportType
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginExtractData(VersionName, ReplicaDescription, ExportOptions, TransportType, callback, asyncState)

public IAsyncResult BeginExtractData( 
   string VersionName,
   GPReplicaDescription ReplicaDescription,
   GDSExportOptions ExportOptions,
   esriGDSTransportType TransportType,
   AsyncCallback callback,
   object asyncState
)