WMI - Windows Management Instrumentation，是基于 Web Based Enterprise Management（WBEM）的面向对象数据库，一个管理企业环境开发的标准接口。可以利用它访问本地主机的一些信息和服务、监视计算机、管理远程计算机…

在VS.NET中需要添加引用：System.Management.dll,这样你的项目才能使用WMI。

WMI 的使用灵活，但 class 也多，如：CPU的系列号－Win32_Processor、主板BIOS的系列号－Win32_BIOS、本地磁盘－Win32_LogicalDisk、共享资源－Win32_share等等，详细的 WMI 类名可以在MSDN中查询 ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.2052/wmisdk/wmi/win32_classes.htm

也可以使用WMI Tools管理WMI服务的名称空间http://www.microsoft.com/downloads/details.aspx?FamilyId=6430F853-1120-48DB-8CC5-F2ABDC3ED314&displaylang=en

用这个程序也可以获取WMI Class Name：

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    Dim WMI As Management.ManagementClass

    Dim info As Management.ManagementObject

‘ 返回 WMI 的 Class Name 到 String Array

    Private Function FindWMI(ByVal IndexString As String, ByVal Deep As Boolean) As String()

        Try

            Dim _WMIList() As String

            WMI = New Management.ManagementClass

            Dim options As New Management.EnumerationOptions

            Dim chClass As String = Nothing

            If Not IndexString Is Nothing Then

                chClass = IndexString

            End If

            options.EnumerateDeep = Deep

            For Each info In WMI.GetSubclasses(options)

                If _WMIList Is Nothing Then

                    ReDim _WMIList(0)

                Else

                    ReDim Preserve _WMIList(UBound(_WMIList) + 1)

                End If

                If chClass Is Nothing Then

                    _WMIList(UBound(_WMIList)) = (info.Item("__Class"))

                Else

                    If info.Item("__Class").ToString.Substring(0, _

                       IIf(info.Item("__Class").ToString.Length > chClass.Length, _

                       chClass.Length, info.Item("__Class").ToString.Length)).ToLower = chClass Then

                        _WMIList(UBound(_WMIList)) = (info.Item("__Class"))

                    End If

                End If

                Application.DoEvents()

            Next

            options = Nothing

            info = Nothing

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