Changing Multiple Ovalshape Size During Runtime?

I am using the PowerPack and trying to change multiple ovalshape size, I have used the following code for changing multiple labels,

For Count As Integer = 1 To 100
Me.Controls("Label" & Count).Text= "Hello World"
Next Count

If I do the same for OvalShape, assume I have OvalShape1, OvalShape2.... OvalShape100

For Count As Integer = 1 To 100
Me.Controls("OvalShape" & Count).Size = New System.Drawing.Size(20, 20)
Next Count

The above throws error when executed.