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WMI是一項行業(yè)推薦規(guī)范，旨在為訪問企業(yè)環(huán)境中的管理信息而開發(fā)一種標(biāo)準(zhǔn)化技術(shù)。該信息包括系統(tǒng)內(nèi)存的狀態(tài)、當(dāng)前安裝的客戶應(yīng)用程序清單，以及有關(guān)客戶端狀態(tài)的其他數(shù)據(jù)。
WMI是可伸縮的系統(tǒng)管理結(jié)構(gòu)，該規(guī)范采用一個統(tǒng)一、基于標(biāo)準(zhǔn)且可擴(kuò)展的面向?qū)ο蠼涌凇Ｋ峁┡c系統(tǒng)管理員信息和基礎(chǔ)WMI API交互的標(biāo)準(zhǔn)方法，主要由系統(tǒng)管理應(yīng)用程序開發(fā)人員和系統(tǒng)管理員用來訪問和操作系統(tǒng)管理信息。
WMI可用來生成組織和管理系統(tǒng)信息的工具，使系統(tǒng)管理人員能夠更密切的監(jiān)視系統(tǒng)活動。
WMI提供了一套內(nèi)置在Microsoft Windows操作系統(tǒng)中的豐富的系統(tǒng)管理服務(wù)，現(xiàn)在有大量的應(yīng)用程序、服務(wù)和設(shè)備用其為信息技術(shù)操作和產(chǎn)品支持組織提供全方位的管理功能。基于WMI的管理系統(tǒng)的使用帶來了更可靠的計算環(huán)境和更高的系統(tǒng)可靠性，從而節(jié)省了企業(yè)的開銷。
WMI提供的大量的規(guī)范為許多高端應(yīng)用程序，例如Microsoft Exchange、Microsoft SQL Server和Microsoft Internet信息服務(wù)(IIS)等實現(xiàn)如下管理任務(wù)。
1．監(jiān)視應(yīng)用程序的運行情況
2．檢測瓶頸或故障
3．管理和配置應(yīng)用程序
4．查詢應(yīng)用程序數(shù)據(jù)(使用對象關(guān)系的遍歷和查詢)
5．執(zhí)行無縫的本地或遠(yuǎn)程管理操作

下面我們通過一個例子來說明WMI的強大功能。以vb6為列：
引用”Microsoft WMI Scripting V1.1 Library”
代碼如下:

				?

									Option Explicit

									Dim WithEvents Sink As SWbemSink

									Dim j As Integer

									'功能:利用wmi組件得到計算機(jī)的信息,每一個小功能分開寫，便于大家查閱

									Private Sub cmdDone_Click()

									Dim oWMINameSpace As SWbemServices

									Dim oLogicalDiskSet As SWbemObjectSet

									Dim oLogicalDisk As SWbemObject

									Dim ObjSet As Variant

									Dim sDrive As String

									Dim sValue As String

									Dim dblSize As Double

									Dim Obj As Variant

									Dim lIndex As Long

									Set oWMINameSpace = GetObject("winmgmts:")

									'得到驅(qū)動器的信息

									On Error Resume Next

									Set ObjSet = oWMINameSpace.InstancesOf("Win32_DiskDrive")

									For Each Obj In ObjSet

									 List5.AddItem Obj.Caption & " - " & BytesToMegabytes(Obj.Size) & " GB"

									Next

									'得到每一個驅(qū)動器的詳細(xì)信息

									On Error GoTo ErrorHandler

									'Set oWMINameSpace = GetObject("winmgmts:")

									Set oLogicalDiskSet = oWMINameSpace.InstancesOf("Win32_LogicalDisk")

									For Each oLogicalDisk In oLogicalDiskSet

									  On Error Resume Next

									  sDrive = oLogicalDisk.deviceid

									  ListView1.ListItems.Add , , sDrive

									  lIndex = ListView1.ListItems.Count

									  sValue = oLogicalDisk.Description & ""

									  ListView1.ListItems(lIndex).SubItems(1) = sValue

									  sValue = oLogicalDisk.FileSystem & ""

									  ListView1.ListItems(lIndex).SubItems(2) = sValue

									  sValue = oLogicalDisk.VolumeName & ""

									  ListView1.ListItems(lIndex).SubItems(3) = sValue

									  sValue = oLogicalDisk.VolumeSerialNumber & ""

									  ListView1.ListItems(lIndex).SubItems(4) = sValue

									  sValue = oLogicalDisk.Size & ""

									  If IsNumeric(sValue) Then

									dblSize = BytesToMegabytes(CDbl(sValue))

									sValue = CStr(dblSize) & " MB"

									  End If

									  ListView1.ListItems(lIndex).SubItems(5) = sValue

									Next

									CleanUp:

									Set oLogicalDisk = Nothing

									Set oLogicalDiskSet = Nothing

									Set oWMINameSpace = Nothing

									Exit Sub

									ErrorHandler:

									MsgBox "" & Err.Description

									GoTo CleanUp

									End Sub

									Private Sub Command1_Click()

									Unload Me

									End Sub

									Private Function BytesToMegabytes(Bytes As Double) As Double

									 Dim dblAns As Double

									 dblAns = (Bytes / 1024) / 1024

									 BytesToMegabytes = Format(dblAns, "###,###,##0.00")

									End Function

									Private Sub Command2_Click()

									Dim oWMINameSpace As SWbemServices

									Dim SystemSet As Variant

									Dim System As Variant

									Dim ObjSet As Variant

									Dim Obj As Variant

									Set oWMINameSpace = GetObject("winmgmts:")

									'操作系統(tǒng)

									Set SystemSet = oWMINameSpace.InstancesOf("Win32_OperatingSystem")

									For Each System In SystemSet

									  List1.AddItem System.Caption

									  List1.AddItem System.Manufacturer

									  List1.AddItem System.BuildType & “” ‘Win9x下好像取不出來

									  List1.AddItem System.Version

									  List1.AddItem System.SerialNumber

									Next

									'cpu

									Set ObjSet = oWMINameSpace.InstancesOf("Win32_Processor")

									For Each Obj In ObjSet

									  List2.AddItem Obj.Caption

									  List2.AddItem Obj.currentclockspeed & " Mhz"

									Next

									End Sub

									Private Sub Command3_Click()

									Dim oWMINameSpace As SWbemServices

									Dim ObjSet As Variant

									Dim Obj As Variant

									Dim Adapter As Variant

									'內(nèi)存

									Set oWMINameSpace = GetObject("winmgmts:")

									Set ObjSet = oWMINameSpace.InstancesOf("Win32_PhysicalMemory")

									Dim i As String

									For Each Obj In ObjSet

									  List3.AddItem BytesToMegabytes(Obj.capacity) & " MB" & " Chip"

									Next

									'網(wǎng)卡

									Set Sink = New SWbemSink

									Set Adapter = GetObject("winmgmts:")

									Adapter.InstancesOfAsync Sink, "Win32_NetworkAdapter"

									End Sub

									Private Sub Form_Load()

									j = 0

									End Sub

									Private Sub Sink_OnObjectReady(ByVal objWbemObject As WbemScripting.ISWbemObject, ByVal objWbemAsyncContext As WbemScripting.ISWbemNamedValueSet)

									Dim Adapter As Variant

									‘得到所有的適配器信息

									Set Adapter = GetObject("winmgmts:Win32_NetworkAdapterConfiguration=" & j & "")

									List4.AddItem Adapter.Description

									If IsNull(Adapter.MACAddress) Then

									  List4.AddItem "No MAC Address"

									  List4.AddItem ""

									Else

									  List4.AddItem "Mac: " & Adapter.MACAddress

									  List4.AddItem ""

									End If

									j = j + 1

									End Sub