No support for lowercase keys in WinForms client.

[bdelsey64]

There does not appear to be support for lowercase characters when using the WinForms VncClient. This client traps the key UP and DOWN events which only deal with KeyEventArgs. Unfortunately KeyEventArgs only provides a key code and does not distinguish between upper and lower case inputs. The result is that SendKeyUpdate(...) always sends an uppercase letter to the remote server. A simple work around could possibly be to make use of the key PRESS event.