Public Function BeginReverseGeocode( _
   ByVal request As ReverseGeocodeRequest, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As BasicHttpBinding_IGeocodeService
Dim request As ReverseGeocodeRequest
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginReverseGeocode(request, callback, asyncState)

public IAsyncResult BeginReverseGeocode( 
   ReverseGeocodeRequest request,
   AsyncCallback callback,
   object asyncState
)