PreviewKeyDown event has multiple entries for the same key sequence

Jul 24, 2012 at 6:10 PM


I am trapping the PreviewKeyDown event and noticed that for any sequence, say Ctrl+Home, Home, whatever, the event handler gets called 4 times.

Why is that?

Is it safe to process one out of every four calls, namely can I count on every machine that the event gets raised four times per key sequnece?

Thanks in advance,