BitmapAlign := TBitmap.Create;
TRY
  // This doesn't make an independent copy (yet).  Problem affects
  // Delphi 3 and 4.
  BitmapAlign.Assign(Bitmaps[2]);

  // Force BitmapAlign to be totally independent of Bitmaps[2]
  // This is an unfortuante kludge needed if Scanline is the only
  // method to access pixel data.  Without this kludge, the
  // original bitmap and "new" bitmap are operating on the same
  // pixel data!!!
  BitmapAlign.Canvas.Pixels[0,0] := Bitmaps[2].Canvas.Pixels[0,0];


  <Scanline-only access of pixel data in BitmapAlign here>

FINALLY
  BitmapAlign.Free
END