How to disable Win key of on-screen keyboard?

Question

I have a app that use in a kiosk. I disable task-bar and win key in registry with SetWindowsHookEx .

But can open startmenu when use On-Screan keyboard. I use PreviewKeyDown event, but don't work.

private void Window_PreviewKeyDown(object sender, KeyEventArgs e)
 {
  if (e.Key == Key.LWin || e.Key==Key.RWin)
     e.Handled = true;
 }

How to disable win key of on-screan keyboard?

Answer 1

This person seems to have it sorted http://sleepydesign.blogspot.co.uk/2013/07/c-disable-system-keys-on-windows-on.html

But the appear from their github to be using the same approach to hooks

I imagine my scan of the code missed something, they're quite confident it works, explicitly refering to the onscreen keyboard and disabling specific functionality .

I believe he virtual code for windows key is

MOD_WIN      (0x0008)

Also take a look at RegisterHotKey