Trying to create a four corner drag image sizer control

I am about to create a application to put many images to a canvas area. I want to put the images there and move them around, by dragging with the mouse.

But I struggle with the implementation of a specific frame around the images where I can resize them by clicking the four corners.

Here is the basic code, only for placing the images and moving them around. Now I want to get the function of resize the images with a four corner frame around each image. Any idea is much appreciated.

Imports System.IO
Imports System.Drawing.Printing
Imports CtlResize

Public Class Form1
  Dim WithEvents pbxNewPicturebox As New PictureBox
  Dim ArrayOfPicturebox(10) As PictureBox
  Dim index As Integer

  Private Sub DynamicMouseMove(ByVal sender As Object, ByVal e As MouseEventArgs)
    Dim pbxPicturebox As Picturebox = DirectCast(sender, Picturebox)
    Static mousePos As Point

    If e.Button = Windows.Forms.MouseButtons.None Then
      mousePos.X = e.X
      mousePos.Y = e.Y
    Else
      pbxPicturebox.Left = pbxPicturebox.Left + (e.X - mousePos.X)
      pbxPicturebox.Top = pbxPicturebox.Top + (e.Y - mousePos.Y)
    End If
  End Sub

  Private Sub ToolStripButton1_Click(sender As Object, e As EventArgs) Handles ToolStripButton1.Click
    OpenFileDialog1.ShowDialog()
    If OpenFileDialog1.FileName = "" Then Exit Sub
    ArrayOfPicturebox(index) = New Picturebox
    Controls.Add(ArrayOfPicturebox(index))
    ArrayOfPicturebox(index).Parent = PictureBox1
    ArrayOfPicturebox(index).Image = Image.FromFile(OpenFileDialog1.FileName)
    ArrayOfPicturebox(index).Visible = True
    ArrayOfPicturebox(index).SizeMode = PictureBoxSizeMode.AutoSize
    ArrayOfPicturebox(index).Refresh()
    ArrayOfPicturebox(index).Name = CStr(index)

    AddHandler ArrayOfPicturebox(index).MouseMove, AddressOf DynamicMouseMove
    index = index + 1
  End Sub
End Class