Movable Dynamic Controls

[SirPereira]

I've this:

Public Class PreviewFrm
 
    Dim worker As MoveResizeControl.controlHandler
 
    'Declarar controlo
    Dim btn As New Button With { _
       .Width = 200, _
       .Height = 200, _
       .Left = 10, _
       .Top = 10, _
       .Text = "Nova caixa de informação", _
       .BackColor = Color.Transparent, _
       .FlatStyle = FlatStyle.Popup}
 
    Private Sub PreviewFrm_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseDown
        worker.deselectAll()
        Invalidate()
    End Sub
 
 
    Private Sub PreviewFrm_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        If worker.boundingRectangle <> Nothing Then
            Dim p As New Pen(Color.Black, 1)
            p.DashStyle = Drawing2D.DashStyle.Dash
            e.Graphics.DrawRectangle(p, worker.boundingRectangle)
        End If
    End Sub
 
    Private Sub PreviewFrm_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        ' Inicializar DLL do Resize e movimento de controlos dinâmicos
        worker = New MoveResizeControl.controlHandler
        worker.boundControls.Add(New MoveResizeControl.controlHandler.boundControl(Me, btn))
        worker.bindControls()
 
 
        Me.Width = My.Computer.Screen.Bounds.Width
        Me.Height = My.Computer.Screen.Bounds.Height
 
    End Sub
 
    Private Sub btn_config_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_config.Click
        ConfigDesignForm.Show()
    End Sub
 
    Private Sub btn_additems_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_additems.Click
        Me.Controls.Add(btn)
        btn.BringToFront()
    End Sub
End Class

Well, now I've changed somethings. I declared the object first.

Now I've another problem. While "moving" or "resizing", it 'crashes'. Imagine that I'm moving it, it moves something like 10pixels, stay with the hand cursor, but it 'crashes' there. Don't happen anything more. It freezes. Suggestions?