Detect When WIndows is Locked/Unlocked

General
1

Does anyone know if there is a way to detect when the user locks or unlocks there windows PC.

2

You can find here some functions to receive notification when the user locks or unlocks the computer.

3

Does anyone know if this is possible via the MBS_WIN plugin I just tried

  const WM_LOCK=&h7
  const WM_UNLOCK=&h8
  call w.ListenForMessage WM_LOCK
  call w.ListenForMessage WM_UNLOCK

Did not work but I don’t think thats the right notification listener for session related events.

4

you need to listen for WM_WTSSESSION_CHANGE (&h02B1).

see
https://msdn.microsoft.com/en-us/library/aa383828(v=vs.85).aspx

than check wParam for being WTS_SESSION_LOCK (7) or WTS_SESSION_UNLOCK (8).