Public Function BeginUpload( _
   ByVal ItemDescriptions() As RasterItemDescription, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As ImageServerProxy
Dim ItemDescriptions() As RasterItemDescription
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginUpload(ItemDescriptions, callback, asyncState)

public IAsyncResult BeginUpload( 
   RasterItemDescription[] ItemDescriptions,
   AsyncCallback callback,
   object asyncState
)