Public Function BeginGetMapTile( _
   ByVal MapName As String, _
   ByVal Level As Integer, _
   ByVal Row As Integer, _
   ByVal Column As Integer, _
   ByVal Format As String, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As MapServerProxy
Dim MapName As String
Dim Level As Integer
Dim Row As Integer
Dim Column As Integer
Dim Format As String
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginGetMapTile(MapName, Level, Row, Column, Format, callback, asyncState)

public IAsyncResult BeginGetMapTile( 
   string MapName,
   int Level,
   int Row,
   int Column,
   string Format,
   AsyncCallback callback,
   object asyncState
)