using SystemParametersInfo

[bastek1604]

Hey!
In my app i want to use SPI_SCREENSAVERRUNNING from SystemParametersInfo to active screen saver
My code:

bool OldState=1;
bool ok;
#if defined(Q_WS_WIN)
 
    ok=SystemParametersInfo(97, TRUE, &OldState, 0);
    QMessageBox::about(parent, "tytul", QString(ok?"T":"F"));
#endif

bool OldState=1;
bool ok;
#if defined(Q_WS_WIN)

    ok=SystemParametersInfo(97, TRUE, &OldState, 0);
    QMessageBox::about(parent, "tytul", QString(ok?"T":"F"));
#endif

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In MessageBox I checking that screen saver is running but i still get "F" - False
What i do wrong because i want to lock all shortkeys ex. alt+tab, alt+ctrl+delete
Thank you in advance for your help
Sory for my english

[squidge]

Why not ask GetLastError for the reason?

[bastek1604]

there is any error from GetLastError. I would like to know there is any possibility to lock screen using SystemParametersInfo on windows xp and 2000 because i'm not sure that it is working on windows nt operating system

[squidge]

Requirements

Minimum supported client
Windows 2000 Professional

[bastek1604]

I'm testing it on windows xp and windows 2003 server

[squidge]

Above you said Windows NT OS, which is not supported. On Windows XP and 2003 server, it should work as expected.