获取开机时间

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1、用当前时间减去从开机到现在经过了的时间：

DWORD dwStartTicks = GetTickCount() / 1000 / 60;// 分钟SYSTEMTIME sysTime;GetSystemTime(&sysTime);FILETIME fileTime;ULARGE_INTEGER ulTime;SystemTimeToFileTime(&sysTime, &fileTime);ulTime.HighPart = fileTime.dwHighDateTime;ulTime.LowPart = fileTime.dwLowDateTime;DWORD dwCurTime = ulTime.QuadPart / (10 * 1000 * 1000 * 60);// 分钟

这种方法不太精确。

2、利用系统函数 NtQuerySystemInformation：

此函数在NTDLL.DLL中导出。

typedef struct{LARGE_INTEGER liKeBootTime;LARGE_INTEGER liKeSystemTime;LARGE_INTEGER liExpTimeZoneBias;ULONG uCurrentTimeZoneId;DWORD dwReserved;} SYSTEM_TIME_INFORMATION; LONG status;SYSTEM_TIME_INFORMATION Sti;HMODULE hMod = LoadLibraryW(L"NTDLL.DLL");if(hMod){typedef NTSTATUS (__stdcall * PFNtQuerySystemInformation)(IN UINT SystemInformationClass,OUT PVOID SystemInformation,IN ULONG SystemInformationLength, OUT PULONG ReturnLength OPTIONAL);PFNtQuerySystemInformation pfnNtQuerySystemInformation = (PFNtQuerySystemInformation)GetProcAddress(hMod, "NtQuerySystemInformation");if(pfnNtQuerySystemInformation)pfnNtQuerySystemInformation(3, &Sti, sizeof(Sti), 0);FreeLibrary(hMod);}DWORD dwCurTime = Sti.liKeBootTime.QuadPart / (1000 * 60); // 分钟

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