ListView Control - ItemActivate event, how to determine what raised the event?

Hi,

I'm writing some code in c# for a mobile device.

I have a list view that raises the ItemActivate event on a double click or by the user selecting an item using the cursor keys and pressing Enter.

This may be a silly question, but how can I determine whether it was the double click or the Enter/Return key pressed that raises the event?

Thanks in advance.

Mark