Time for action – adding event handlers

1. Add the following directive to the top of the Level Editor project's Game1 class:

   Imports Tile_Engine

2. Add the following declaration to the declarations area of the Game1 class of the Level Editor project:

   Private gameForm As System.Windows.Forms.Control

3. Add the following code to the constructor of the Game1 class:

   gameForm = System.Windows.Forms.Control.FromHandle(Me.Window.Handle)
   AddHandler gameForm.VisibleChanged, AddressOf gameForm_VisibleChanged
   AddHandler pictureBox.SizeChanged, AddressOf pictureBox_SizeChanged

4. Add the two event handlers to the Game1 class:

   Private Sub gameForm_VisibleChanged(sender As object, e as EventArgs)
     If gameForm.Visible Then
       gameForm.Visible = False
     End If
   End Sub
   
   Private Sub pictureBox_SizeChanged(sender As object, e As EventArgs)
     If (parentForm.WindowState <>
       System.Windows.Forms.FormWindowState.Minimized) Then
         graphics.PreferredBackBufferWidth = pictureBox.Width
         graphics.PreferredBackBufferHeight...