Public Function BeginGetNextResultPortion( _
   ByVal DesiredRange As ResultPortionInfo, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As GeoDataServerProxy
Dim DesiredRange As ResultPortionInfo
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginGetNextResultPortion(DesiredRange, callback, asyncState)

public IAsyncResult BeginGetNextResultPortion( 
   ResultPortionInfo DesiredRange,
   AsyncCallback callback,
   object asyncState
)