> It must be the responsibility of the OS to prevent console users
> interacting with applications when the desktop is locked. No user
> process should ever be able to bypass the lock mechanism.

If we take a look to WinAPI help for, i.e. MessageBox, we see, that it
has a flag (WindowsNT only), called MB_SERVICE_NOTIFICATION:

(..) The caller is a service notifying the user of an event. The
function displays a message box on the current active desktop, even if
there is no user logged on to the computer (..)

So we can write a small test program:

---[ test.c ]---
#include <windows>
void main()
{
  Sleep(3000); // Pause, to give you time to lock
                                    // the computer
  MessageBox(
    NULL, // HWND, should be NULL
    "Who cares if we are locked?", // Messagebox text
    "Test", // Messagebox caption
    MB_OK | MB_SERVICE_NOTIFICATION // Flags
  );
}

and this gives a chance for almost any appl to communicate with user
on WinNT, even if the computer is locked.

Just my 0.02 Ls -

elfs,
  Latvia

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