Place A Mousedown Function Over All Controls On Form?

Dim img As New Windows.Forms.PictureBox
img.Location = New System.Drawing.Point(newx, newy)
img.BackgroundImageLayout = ImageLayout.Zoom
img.Size = New System.Drawing.Size(100, 100)
img.Name = "img" & t

I need a mousedown function to cover all the images that are produced by the above code.The following code only affects the areas that aren't covered by the images. I just need something that covers the whole form

Private Sub main_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyClass.MouseDown
MsgBox(Me.GetChildAtPoint(e.Location))
End Sub