When XL2007 is running under Vista, the Save As dialog contains a Save
Thumbnail checkbox which if checked creates a thumbail image of (I guess)
the active worksheet that can be subsequently displayed in the Open dialog.

I've tried recording a macro that captures a Save As with and without the
Thumbnail property checked and see no difference in the arguments.

My snarfing around in the object model help also didn't surface anything.

Does anybody know how this can be controlled? To ensure that when my code
saves a workbook that a thumbnail is saved with it? Is there anyway to
control the saved thumbnail image?

TIA,

josh