Visual Basic

Public Class CExtraData
    Private value1M As String
    Private value2M As String

    Public Property Value1() As String
        Get
            Return Me.value1M
        End Get
        Set(ByVal valueA As String)
            Me.value1M = valueA
        End Set
    End Property


    Public Property Value2() As String
        Get
            Return Me.value2M
        End Get
        Set(ByVal valueA As String)
            Me.value2M = valueA
        End Set
    End Property
End Class

Private extraDataM As New CExtraData

Public Property ExtraData() As CExtraData
    Get
        Return Me.extraDataM
    End Get
    Set(ByVal valueA As CExtraData)
        Me.extraDataM = valueA
    End Set
End Property

... .ExtraData.Value1
... .ExtraData.Value2

 <serializable()> Public Class CExtraData
...

< System.ComponentModel.Localizable(True), _
System.ComponentModel.DesignerSerializationVisibility( _
             System.ComponentModel.DesignerSerializationVisibility.Content) > _
Public Property ExtraData() As CExtraData
...

BarNum2 As String * 2

<vbfixedstring(2),system.runtime.interopservices.marshalas(system.runtime.interopservices.unmanagedtype.byvalarray,sizeconst:>Public BarNum2() As Char

If msg = WM_Notify Then
  'figure out if it was the collapsed or opened message.. wparam?
  'do what I want to do.
End If