Alternative Ways to Get System Time

[ntstatus]

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#pragma comment(lib, "ntdll.lib")
#include <Windows.h>
#include <winternl.h>

#define SystemTimeOfDayInformation 3

typedef struct _SYS_TIMEOFDAY_INFO {
    LARGE_INTEGER BootTime;
    LARGE_INTEGER CurrentTime;
    LARGE_INTEGER TimeZoneBias;
    ULONG TimeZoneId;
    ULONG Reserved;
    ULONGLONG BootTimeBias;
    ULONGLONG SleepTimeBias;
} SYS_TIMEOFDAY_INFO, *PSYS_TIMEOFDAY_INFO;

BOOL GetCrntTime(PLARGE_INTEGER crntTime)
{
    LARGE_INTEGER ret;
    SYS_TIMEOFDAY_INFO sysTimeInfo;
    ULONG cbNeeded = sizeof(sysTimeInfo);
    if (NT_SUCCESS(NtQuerySystemInformation(SystemTimeOfDayInformation, &sysTimeInfo, cbNeeded, &cbNeeded)))
    {
        *crntTime = sysTimeInfo.CurrentTime;
        return TRUE;
    }
    else return FALSE;
}
// Alternative Ways to get system time
int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow)
{
    FILETIME fileTime;
    SYSTEMTIME sysTime,t2;

    //Method1: Kernel32
    //GetSystemTimeAsFileTime(&fileTime);

    //Method2 : ntdll
    //NtQuerySystemTime(&fileTime);

    //Method3 : ntdll
    GetCrntTime(&fileTime);

    FileTimeToSystemTime(&fileTime, &sysTime);  
    return 0;
}

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