Public Function BeginGetRasterMetadata( _
   ByVal RID As Integer, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As ImageServerProxy
Dim RID As Integer
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginGetRasterMetadata(RID, callback, asyncState)

public IAsyncResult BeginGetRasterMetadata( 
   int RID,
   AsyncCallback callback,
   object asyncState
)