How can I display the thumbnail of a video file in a Picturebox?

[Schmidt]

Any response to my post #28 would be greatly appreciated.
...
I need to make the thumbnail show center-justified and be the correct size (fit the picturebox).
I don't know how to do that.

The cGDIPlusCache.DrawImage method has additional (optional x, y, ...) Params to offer.
IMO you need to play around more with IntelliSense.
(I often just "type an extra space" in between Params for a fast lookup of a Method-Defs ParamList).

And as for "how to calculate centered Offsets".
I think you're programming long enough, to have seen this "halfed-difference" thing a few times:
x = (ContainerObj.Width - ObjToCenter.Width) / 2 'same for y-Offsets with the Heights

Here's the caching-code again, which now does that...

Option Explicit

Private GC As New cGDIPlusCache

Private Sub Form_Click()
  CacheAndRenderThumb "c:\temp\test.avi", Thumbnail_P_B
End Sub

Private Sub CacheAndRenderThumb(FileName As String, PB As PictureBox)
  PB.AutoRedraw = True
  PB.Cls
  PB.ScaleMode = vbPixels
    Dim Key As String, x As Long, y As Long
        Key = Mid$(FileName, InStrRev(FileName, "\") + 1)
    If Not GC.Exists(Key) Then GC.AddFromShell Key, FileName, PB.ScaleWidth
    x = (PB.ScaleWidth - GC.Width(Key)) / 2
    y = (PB.ScaleHeight - GC.Height(Key)) / 2
    GC.DrawImage PB.hDC, Key, x, y
  PB.Refresh
End Sub

Olaf