My spoiler control. how to add text field.

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VB

Hello everyone, I decided nevertheless to create a thread in the forum as well as a question, it seems to me interesting.
So. VB.Net, Windows Forms. I would like to make my Controll as a spoiler, which are used on forums to hide / deployment of the text.

"Skeleton" spoiler is visible on the link

Spoiler - 288x158[^]

Now a question: How to make so that it was possible in the text property of Label1 paste text?
Thank you for attention! Bricks in my party are welcome :)
P.S. Sorry fo my English. Its Google Translate :)

What I have tried:

So I decided to disclosure and closing the spoiler:

Private Sub MoreBtn_Click(sender As Object, e As EventArgs) Handles MoreBtn.Click
        If Tag = 0 Then
            Tag = 1
            SpoilerText.Size = New Size(250, 80)
            MoreBtn.Location = New Point(184, 110)
        Else
            Tag = 1
            SpoilerText.Size = New Size(250, 20)
            MoreBtn.Location = New Point(190, 35)
            Tag = 0
 
            GoTo a
        End If
 
a:
 
    End Sub