Public Function BeginGetServiceDescriptionsEx( _
   ByVal FolderName As String, _
   ByVal callback As AsyncCallback, _
   ByVal asyncState As Object _
) As IAsyncResult

Dim instance As Catalog
Dim FolderName As String
Dim callback As AsyncCallback
Dim asyncState As Object
Dim value As IAsyncResult
 
value = instance.BeginGetServiceDescriptionsEx(FolderName, callback, asyncState)

public IAsyncResult BeginGetServiceDescriptionsEx( 
   string FolderName,
   AsyncCallback callback,
   object asyncState
)