本帖最后由 tan133 于 2012-5-14 19:19 编辑
已经知道WMI和另一种方法可以做到,只是在网上看到这一文,我只会一点AU3
有兴趣的可以参考下
转自孤独剑客的博客,最近一直研究MFC的东东,今天忽然发现大牛博客有这么个文章就转过来了……
希望不要说我侵权……
原文地址:http://www.janker.org/post/45.html
利用ntdll.dll中没有公开的API函数: NtQuerySystemInformationtypedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG);
PROCNTQSI NtQuerySystemInformation;
NtQuerySystemInformation = (PROCNTQSI)GetProcAddress(
GetModuleHandle("ntdll"),
"NtQuerySystemInformation"
);
if (!NtQuerySystemInformation)
{
return;
}
// get number of processors in the system
status = NtQuerySystemInformation(SystemBasicInformation,
&SysBaseInfo,sizeof(SysBaseInfo),NULL);
if (status != NO_ERROR)
{
return;
}
status = NtQuerySystemInformation(SystemTimeInformation,
&SysTimeInfo,sizeof(SysTimeInfo),0);
if (status!=NO_ERROR)
{
return;
}
// get new CPU''s idle time
status = NtQuerySystemInformation(SystemPerformanceInformation,
&SysPerfInfo,sizeof(SysPerfInfo),NULL);
if (status != NO_ERROR)
{
return;
}
// if it''s a first call - skip it
if (m_liOldIdleTime.QuadPart != 0)
{
// CurrentValue = NewValue - OldValue
dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(m_liOldIdleTime);
dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(m_liOldSystemTime);
// CurrentCpuIdle = IdleTime / SystemTime
dbIdleTime = dbIdleTime / dbSystemTime;
// CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors
dbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5;
m_fNewUsges = (UINT)dbIdleTime;
}
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