KeyEventArgs.Handled vs KeyEventArgs.SupressKeyPress

Question

What's the difference between using

e.Handled = true

and

e.SuppressKeyPress = true

I've read that SuppressKeyPress calls e.Handled but else does it do?

Answer 1

According to this blog: New keyboard APIs: KeyEventArgs.SuppressKeyPress:

The problem is that "Handled" doesn't take care of pending WM_CHAR messages already built up in the message queue - so setting Handled = true does not prevent a KeyPress from occurring.

In order not to break anyone who has currently got e.Handled = true, we needed to add a new property called SuppressKeyChar. If we went the other way, if "handling" a keydown suddenly started to actually work, we might break folks who accidentally had this set to true.