Trigger Action on Windows unlock

[bsfreely]

Hello!

I have used LLT since 2022 and have found it helpful. It is getting (and looking) very good!

Is there a way to set up an Action that starts on Windows unlock? There are 2 triggers that seem similar. "On resume" triggers when Windows wakes after sleep. "When user becomes active" triggers when it senses activity after inactivity (the duration of which is selectable).

One utility I use often stops working without crashing. I haven't figured out exactly what precedes this. Terminating the process and restarting it on unlock seems to work in all cases. Doing this on waking misses some cases, while after every minute or two of inactivity is not ideal because of the time it takes to restart it.

Lenovo Legion 5 17ACH6 82K0, Windows 11 24H2, Lenovo Legion Toolkit 2.25.0

[BartoszCichecki]

Not a bad idea. Notifications sent by windows are a bit funky sometimes so I need to see if that can work reliably.

[Ace-Radom]

Any updates to this one? If this way is reliable I can open a PR for that, isn't complex at all.

[BartoszCichecki]

I did some research today and I can't find a way to check if screen is currectly locked - not via event. There are some workaround with checking for some processes, but not sure if that is a good idea...

[Ace-Radom]

Would this post help you? It uses WTS api which is provided win7 and above.

I also wrote a small demo in C++ which checks session status every seconds. It works well on my side.

#include<iostream>
#include<thread>

#include<windows.h>
#include<WtsApi32.h>

#pragma comment(lib, "Wtsapi32.lib")

bool isSessionLocked() {
    WTSINFOEXW* pInfo = NULL;
    WTS_INFO_CLASS wtsic = WTSSessionInfoEx;
    LPTSTR ppBuffer = NULL;
    DWORD dwBytesReturned = 0;
    LONG sessionFlags = WTS_SESSIONSTATE_UNKNOWN;
    // until we know otherwise. Prevents a false positive since WTS_SESSIONSTATE_LOCK == 0

    DWORD dwSessionID = WTSGetActiveConsoleSessionId();

    if (WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE, dwSessionID, wtsic, &ppBuffer, &dwBytesReturned))
    {
        if (dwBytesReturned > 0)
        {
            pInfo = (WTSINFOEXW*)ppBuffer;
            if (pInfo->Level == 1)
            {
                sessionFlags = pInfo->Data.WTSInfoExLevel1.SessionFlags;
            }
        }
        WTSFreeMemory(ppBuffer);
        ppBuffer = NULL;
    }

    return (sessionFlags == WTS_SESSIONSTATE_LOCK);
}

int main() {
    for (int i = 0; i < 100; i++)
    {
        std::cout << (isSessionLocked() ? "locked" : "unlocked") << std::endl;
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }
    return 0;
}

[BartoszCichecki]

Great stuff, this should work 👍

[BartoszCichecki]

PS: if you have time, you can totally take a shot at this - no pressure though