VB Express 2010 Hundreds of Pictures chosen randomly

[Groer]

I want to be able to randomly choose a picture of a student from hundreds of possible ones and display it in a picture box.
Using "Select Case intRndStudent" works fine when tested for 14 students

   Select Case intRndStudent
            Case 1
                picStudent.Image = My.Resources.1
            Case 2
                picStudent.Image = My.Resources.2

but the code will be incredibly long and adding another picture is a chore

I want to use a variable but I can't get it to work.

        intRndStudent = Int(Rnd() * intNumPics) + 1 ' choose a picture at random
        txtOutput.Text = intRndStudent ' used to check that random number is being chosen correctly

        picStudent.Image = My.Resources.intRndStudent ' this code is bad - Error	1	'intRndStudent' is not a member of 'Resources'.

Would someone please tell me why this does not work and how to make it work?