关于系统唤醒

Question

如果电脑进入待机(挂起)或休眠状态时可否用程序在特定时间唤醒它?

Answer 1

http://community.csdn.net/Expert/FAQ/FAQ_Index.asp?id=187906

Answer 2

http://blog.csdn.net/amh/archive/2005/01/01/236765.aspx
http://www.enet.com.cn/eschool/inforcenter/A20040325297428.html

Answer 3

在程序让系统进入S3或S4之前，或程序收到系统suspend消息时，加上这样一段：
HANDLE hTimer=::CreateWaitableTimer(NULL,TRUE,"WaitForResume");
if(!hTimer)
{
MessageBox("Fail to create waitable timer!");
//break;
}
hTimer=OpenWaitableTimer(TIMER_ALL_ACCESS,TRUE,"WaitForResume");
LARGE_INTEGER liDueTime;
liDueTime.QuadPart=nSecond*1000*1000*(-10);  //nSecond指定几秒钟唤醒
if(!::SetWaitableTimer(hTimer,&liDueTime,0,NULL,NULL,TRUE))
{
MessageBox("Fail to set waitable timer!");
break;
}