Another simple question that i'm not familiar with in vb

In say actionsctipt etc i can reduce a lot of code by creating dynamic variable names etc

How to i transform somthing like this:
Code:
PictureBox1.Visible = False
PictureBox2.Visible = False
PictureBox3.Visible = False
Into something like this, (which i know is very wrong!):
Code:
Dim i As Integer
For i = 1 To 3
"PictureBox"&i = False
Next
Any help is much appreciated