I don't think you'll be able to do it with Ctrl+Alt because you can't detect consecutive KeyDown events for different keys with the Alt key down. This works with Ctrl+Shift. Set the form's KeyPreview property to True and:
VB Code:
  1. Private jDown As Boolean = False 'Whether the J key is depressed.
  2.     Private nDown As Boolean = False 'Whether the N key is depressed.
  3.  
  4.     Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown
  5.         If e.KeyCode = Keys.J Then
  6.             Me.jDown = True
  7.         ElseIf e.KeyCode = Keys.N Then
  8.             Me.nDown = True
  9.         End If
  10.  
  11.         If e.Control AndAlso e.Shift AndAlso Me.jDown AndAlso Me.nDown Then
  12.             MessageBox.Show("Coded by Justin Nel")
  13.         End If
  14.     End Sub
  15.  
  16.     Private Sub Form1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyUp
  17.         If e.KeyCode = Keys.J Then
  18.             Me.jDown = False
  19.         ElseIf e.KeyCode = Keys.N Then
  20.             Me.nDown = False
  21.         End If
  22.     End Sub