I certainly agree that there are better ways to do this but, if the assignment tells you that you are supposed to use the ImageLocation property then that's probably what you should do. Some instructors will appreciate your taking initiative while others will not appreciate your not following instructions. In that case, I'd tend to suggest naming the images based on the number of wrong guesses that they represent. You can then store the number of wrong guess in an Integer variable and use that to create the file path, e.g.
vb.net Code:
  1. myPictureBox.ImageLocation = IO.Path.Combine(folderPath, wrongGuessCount & ".jpg")