This program will allow you to magnify whatever the computer mouse is hovering on. You are able to resize the form too. To activate the magnifying window, you have to click on the form once.
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All we need is a 'pictureBox' and a 'Timer'. The timer will do most of the job with 18 lines of code. First we have to code the mouse positions and the syncing of the magnifying form. We set our resolution in 'MousePosition.Y' and 'MousePosition.X'.
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If MousePosition.X = 0 Then
Me.Hide()
Else : Me.Show()
End If
If MousePosition.Y > 1300 Then '780
Me.Close()
End If
If MousePosition.Y 1000 Then '500
Me.Location = (New Drawing.Point(MousePosition.X, MousePosition.Y + 75))
Else
Me.Location = (New Drawing.Point(MousePosition.X, MousePosition.Y - 220))
End If

break
But that's not the end of the code, in the timer we would have to declare a drawing.bitmap.
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Dim picontrol As New Drawing.Bitmap(300, 300)
Dim gx As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(picontrol)
gx.CopyFromScreen(New Drawing.Point(MousePosition.X - (10), MousePosition.Y - (20)), New Drawing.Point(0, 0), picontrol.Size)
Me.PictureBox1.Size = New Size(picontrol.Size.Width * 5, picontrol.Size.Height * 5)
Me.PictureBox1.SizeMode = PictureBoxSizeMode.StretchImage
Me.PictureBox1.Image = picontrol

break
All that's rest, is the mouse click code. Go to the Form properties and set a Form1_MouseClick event. We will set our timer interval and make it start.
break

Timer1.Interval = 10
Timer1.Start()
Me.Hide()

break
Hope you learn something from this! This program was made in VB.NET version 3.5 framework, in Visual Studio 2017.

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