用VC++实现Windows 2000/XP下的休眠

fprintf(stderr,”%s error! (rc=%lu)\n”, szAPI, dwLastError);

if(dwBufferLength=FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFF ER |
FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
dwLastError,
LANG_NEUTRAL,
(LPTSTR) &MessageBuffer,
0,
NULL))
{

DWORD dwBytesWritten;

WriteFile(GetStdHandle(STD_ERROR_HANDLE),
MessageBuffer,
dwBufferLength,
&dwBytesWritten,
NULL);
LocalFree(MessageBuffer);
}
}

INT SetPower()有 //主要功能函数
{

TOKEN_PRIVILEGES tp;
HANDLE hToken;
LUID luid;

LPTSTR MachineName=NULL;

if(!OpenProcessToken(GetCurrentProcess(), ////////从这里////////////////////////////
TOKEN_ADJUST_PRIVILEGES,
&hToken ))
{
PERR(“OpenProcessToken”, GetLastError() );
return RTN_ERROR;
}

if(!LookupPrivilegeValue(MachineName, SE_SHUTDOWN_NAME, &luid))

{
PERR(“LookupPrivilegeValue”, GetLastError() );
return RTN_ERROR;
}

tp.PrivilegeCount = 1;
tp.Privileges[0].Luid = luid;
tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

AdjustTokenPrivileges(hToken, FALSE, &tp, sizeof(TOKEN_PRIVILEGES),
NULL, NULL ); ////////////////到这里,是取得权限//////////////////////

SetSystemPowerState(FALSE,TRUE);
return 0;

}

这样,在任意需要休眠的时候调用SetPower();即可休眠,但是有一点要注意:必须打开了高级电源管理的休眠支持。