The following example opens an .avi file by using the Open Dialog, and begins playing it automatically. To try the example, place an Animation control and a CommonDialog control on a form, and paste the code into the form's Declarations section. Run the example, and choose an .avi file to open.
Private Sub Animation1_Click ()
With CommonDialog1
.Filter = "avi (*.avi)|*.avi"
.ShowOpen
End With
With Animation1
.Autoplay = True
.Open CommonDialog1.Filename
End With
End Sub