Is there any way to add a button to the 'My Computer' toolbar?

Is there anyway to add a button to the 'My Computer' toolbar or the 'Windows Explorer' (not Internet explorer) toolbar? I need to make an option available that won't work on a context menu. If I could have a toolbar button act on the currently selected file/folder then I'd be in business. Any ideas?

hi. I am into this problrm myself. The only solution that I came with is "injecting" my button through a dll injection. this is a heavy and dirty solution. please notify me if there is another one