object collision

hello all, I was wondering how I could have an object bounce back when it collides with an rectangle shape. There are multiple rectangle shapes and I don't want to do it all seperately for each one. Does someone know how to do this?
Thanks a lot, Nick Dekker

here's an example:

vb Code:

Public Class Form2
 
    Dim objects() As PictureBox
 
    Private Enum direction
        N
        NE
        E
        SE
        S
        SW
        W
        NW
    End Enum
 
    Dim currentDirection As direction = direction.N
 
    Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        objects = New PictureBox() {PictureBox1, PictureBox2, PictureBox3}
        Timer1.Enabled = True
    End Sub
 
    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
 
        Select Case currentDirection
            Case direction.N
                PictureBox4.Top -= 10
            Case direction.NE
                PictureBox4.Top -= 10
                PictureBox4.Left += 10
            Case direction.E
                PictureBox4.Left += 10
            Case direction.SE
                PictureBox4.Top += 10
                PictureBox4.Left += 10
            Case direction.S
                PictureBox4.Top += 10
            Case direction.SW
                PictureBox4.Top += 10
                PictureBox4.Left -= 10
            Case direction.W
                PictureBox4.Left -= 10
            Case direction.NW
                PictureBox4.Top -= 10
                PictureBox4.Left -= 10
        End Select
 
        Dim hit As PictureBox = objects.FirstOrDefault(Function(o) o.Bounds.IntersectsWith(PictureBox4.Bounds))
        If hit IsNot Nothing Then
            'PictureBox4 has collided with another picturebox
            'change currentDirection
        End If
    End Sub
 
End Class