[quote user="David Harris"]I see this from time to time, but am not sure quite why it happens, nor how to fix it.

I'll note it as something to revisit next time I'm working on the frame window code.

[/quote]

The simple strategy mentioned in  KB135788 has always worked for me.

 - Vince 

Is there a way to simply dismiss the tray icon's popup menu?  I can't find one.

FWIW, to allow <Esc> or a stray mouse click to cancel a tray icon's popup menu, I use

    SetForegroundWindow(hwndMenuOwner);

    TrackPopupMenu(..., hwndMenuOwner, ...);

[See http://support.microsoft.com/kb/135788]

 - Vince
 

I see this from time to time, but am not sure quite why it happens, nor how to fix it.

I'll note it as something to revisit next time I'm working on the frame window code.

Cheers!

-- David --