VC++设计图形显示CPU内存利用率程序

程序思想与要点:

1)、本程序分两种情况来获取CPU的利用率，NT下利用ntdll.dll中没有公开的API: NtQuerySystemInformation，9x下利用注册表来获取CPU的利用率

code:NTtypedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG);PROCNTQSI NtQuerySystemInformation;NtQuerySystemInformation = (PROCNTQSI)GetProcAddress(GetModuleHandle("ntdll"),"NtQuerySystemInformation");if (!NtQuerySystemInformation){return;}// get number of processors in the systemstatus = 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 timestatus = NtQuerySystemInformation(SystemPerformanceInformation,&SysPerfInfo,sizeof(SysPerfInfo),NULL);if (status != NO_ERROR){return;}// if it''s a first call - skip itif (m_liOldIdleTime.QuadPart != 0){// CurrentValue = NewValue - OldValuedbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(m_liOldIdleTime);dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(m_liOldSystemTime);// CurrentCpuIdle = IdleTime / SystemTimedbIdleTime = dbIdleTime / dbSystemTime;// CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessorsdbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5;m_fNewUsges = (UINT)dbIdleTime;} 

2)、 通过 GlobalMemoryStatus来获取内存的使用情况

code:

MEMORYSTATUS MemStat;

MemStat.dwLength = sizeof(MEMORYSTATUS);

GlobalMemoryStatus(&MemStat);

m_ulNewUsges = MemStat.dwMemoryLoad;

3)、 程序中封装了两个类 CcpuUsgesCtl和CmemUsgesCtl，使用这两这个类可以实现CPU，内存利用率的定时读取，并以图形化的形式显示出来

使用

有两种使用方法，不过要先把这个类的文件 add to project

1).声明一个这两类的对象，并用create来动态生成

such as:CMemUsgesCtl m_ MyMemCtrl;CCpuUsgesCtl m_ MyCpuCtrl;…………if(!m_MyCpuCtrl.Create(WS_CHILD | WS_VISIBLE, rect, this, IDC_CPUCTL)){TRACE0("Create m_MyCtrl Failed!");return 0;}rect.left = rect.right + 20;rect.right += lpCreateStruct->cx / 2;if(!m_MyMemCtrl.Create(WS_CHILD | WS_VISIBLE,rect, this, IDC_MEMCTL)){TRACE0("Create m_MyCtrl Failed!");return 0;} 

2) 插入一个static控件，并从类向导中为其生成control形变量,最后将变量的类型换为我们就行了