Public Function BeginImportData( _
   ByVal Data As GDSData, _
   ByVal ImportFormat As esriGDSImportFormat, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As GeoDataServerProxy
Dim Data As GDSData
Dim ImportFormat As esriGDSImportFormat
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginImportData(Data, ImportFormat, callback, asyncState)

public IAsyncResult BeginImportData( 
   GDSData Data,
   esriGDSImportFormat ImportFormat,
   AsyncCallback callback,
   object asyncState
)