I am trying to understand exactly what the handle property of the
KeyPressEventsArgs does.  I thought I could set it to false to prevent
a key from being included into a textbox.  For example, if I wanted
only numbers in my textbox and the user pressed an alpha character key,
then I would set the handle property to false and it would be as if the
KeyPress event never occurred thus negating the keystroke.  However,
what I am seeing is the pressed key still ends up in my textbox.  I
read on MSDN that if the handle is set to false, the operating system
uses a default process to handle the event which is what I figure is
putting the keystroke into the textbox.  Is this true or am I
misreading what happens?  If it is true, what does setting the handle
property to false actually do?

-Thanks