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All of the controls on a form makeup a collection. The For Each loop can be used to loop through each object in a collection.
Start a new application and place a few controls of various types on the form.
Write the code to arrange the controls in Form Load:

'Use For Each to align the controls
Public Class Form1
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim myControl As Control
        Dim Y As Integer
        For Each myControl In Me.Controls
            myControl.SetBounds(0, Y, myControl.Width, myControl.Height)
            Y += myControl.Height + 10
        Next myControl
    End Sub
End Class

At run time the controls are arranged neatly.

NEXT: For Loops