Non-privileged processes' event tracing doesn't work

[ForNeVeR]

1. Start ManagedSpy with elevated privileges (nothing else will work due to Access denied if ran without admin rights #12).
2. Start any Windows Forms process in the non-privileged mode.
3. Enable event tracing in ManagedSpy, focus Windows Forms window.

Expected: event window in ManagedSpy should show the events.

Actually: event window is empty.

It will work only if both of the processes will run in the same privilege level (e.g. both elevated). The feature is called UIPI and it means that low-privileged process (e.g. Windows Forms application) messages won't reach our high-privileged process.

I believe that #16 has a fix for that.