Detecting Show Desktop

I have an application that is running as an AppBar using the SHAppBarMessage API. It works great except when a user clicks the show desktop button. This causes my application to go away and it will not show up again until the user clicks another application. Is there a way to detect when the ShowDesktop button was clicked, so I can make sure my app stays in the foreground?

I tried detecting the Form_Resize event, but that is not fired when the user clicks the Show Desktop button.

Any help would be appreciated.

Here is a thread about the same thing : http://www.vbforums.com/showthread.php?t=326167

The only other way around a timer is subclassing, but I have no idea what message you would have to capture (if you can even do this).