实现休眠功能很简单,只要在任意想要执行的地方执行如下给出的休眠函数SetPower()就行,其实休眠很简单,只需要API:SetSystemPowerState()就行,就如关机/注销/重启一样,只需要ExitWindowEx(),但这些API可以直接用在98下,却不能用在2000/XP中,因为这里牵涉到了用户权限,没有权限是不能进行这些操作的,所以,首先要取得权限,下面给出代码:

#define RTN_ERROR 13

void  PERR(LPTSTR szAPI, DWORD dwLastError)   //休眠时调用到的一个函数,用来

                                                                             ////记录休眠中遇到的错误

{
    LPTSTR MessageBuffer;
    DWORD dwBufferLength;
    fprintf(stderr,"%s error! (rc=%lu)\n", szAPI, dwLastError);

    if(dwBufferLength=FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
                                    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。