Public MustOverride Sub SetLayerVisibility( _
   ByVal map As String, _
   ByVal layerID As Integer, _
   ByVal visible As Boolean _
) 

Dim instance As PageLayoutBase
Dim map As String
Dim layerID As Integer
Dim visible As Boolean
 
instance.SetLayerVisibility(map, layerID, visible)

public abstract void SetLayerVisibility( 
   string map,
   int layerID,
   bool visible
)