evenement click sur polygone

Option Strict On
Public Class Form1
    Dim rd As New Random

    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        Me.WindowState = FormWindowState.Maximized
        '301 formes
        For x = 0 To 300
            'liste de points
            Dim pts As New List(Of Point)
            'ajout des points
            pts.Add(New Point(rd.Next(300), rd.Next(300)))
            pts.Add(New Point(rd.Next(300), rd.Next(300)))
            pts.Add(New Point(rd.Next(300), rd.Next(300)))
            pts.Add(New Point(rd.Next(300), rd.Next(300)))
            pts.Add(New Point(rd.Next(300), rd.Next(300)))
            pts.Add(New Point(rd.Next(300), rd.Next(300)))
            pts.Add(New Point(rd.Next(300), rd.Next(300)))
            pts.Add(New Point(rd.Next(300), rd.Next(300)))
            pts.Add(New Point(rd.Next(300), rd.Next(300)))

            'nouvelle instance de classe
            Dim pct As New clsPiece(pts, x.ToString)
            'paramètres
            With pct
                .BackColor = Color.FromArgb(rd.Next(255), rd.Next(255), rd.Next(255))
                .Location = New Point(rd.Next(1000), rd.Next(1000))
                .Size = New Size(300, 300)
            End With
            'événements
            AddHandler pct.MouseEnter, AddressOf pct_MouseEnter
            AddHandler pct.MouseLeave, AddressOf pct_MouseLeave
            AddHandler pct.Click, AddressOf pct_Click
            'ajout au formulaire
            Me.Controls.Add(pct)
        Next
    End Sub


    'événements picturebox
    Private Sub pct_Click(sender As Object, e As EventArgs)
        MessageBox.Show(DirectCast(sender, PictureBox).Name)
    End Sub

    Private Sub pct_MouseEnter(sender As Object, e As EventArgs)
        Cursor = Cursors.Hand
    End Sub

    Private Sub pct_MouseLeave(sender As Object, e As EventArgs)
        Cursor = Cursors.Default
    End Sub

End Class


Public Class clsPiece
    Inherits PictureBox

    Sub New(points As List(Of Point), Nom As String)
        Me.Name = Nom
        Dim _region(points.Count - 1) As Byte
        For x = 0 To points.Count - 1
            _region(x) = CType(Drawing2D.PathPointType.Line, Byte)
        Next
        'déclaration du graphic path
        Dim path As New Drawing2D.GraphicsPath(points.ToArray, _region)
        'régionage du picturebox
        Me.Region = New Region(path)
    End Sub

End Class