Visual Basic WMI System Services
Obtaining Processor Information using WMI
Posted:   Monday March 04, 2002
Updated:   Monday November 28, 2011
Applies to:   VB5, VB6
Developed with:   VB6, Windows XP
OS restrictions:   Windows NT, 2000, XP. See Prerequisites below.
Author:   VBnet - Randy Birch


Win32_BaseBoard: WMI Baseboard (Motherboard) Info
Win32_BIOS: WMI System BIOS Information

Win32_Processor: WMI Processor Information
Win32_CacheMemory: WMI System Cache Memory Info
Win32_TemperatureProbe: WMI Temperature Probe Info
Windows Script Host is built into Microsoft Windows 98, 2000, ME and XP. If you are running Windows 95 or NT4, you can download Windows Script Host from the Microsoft Windows Script Technologies Web site at Some information is not returned on non-NT-based systems.

A reference set in Projects / References to the Microsoft WMI Scripting Library.

The Win32_Processor WMI class returns processor status and information for both single and multiprocessor machines.

This demo and illustration only show some of the available information from the class. For a complete listing see the table in the Comments section below. Note that some systems may not return information in all class properties.

 BAS Module Code

 Form Code
To a form add a command button (Command1) and a listview (Listview1). Set a reference in Projects / References to the Microsoft WMI Scripting Library, and add the following to the form:

Option Explicit
' Copyright 1996-2011 VBnet/Randy Birch, All Rights Reserved.
' Some pages may also contain other copyrights by the author.
' Distribution: You can freely use this code in your own
'               applications, but you may not reproduce 
'               or publish this code on any web site,
'               online service, or distribute as source 
'               on any media without express permission.
'/* Below used for listview column auto-resizing
Private Const LVM_FIRST As Long = &H1000
Private Const LVM_SETCOLUMNWIDTH As Long = (LVM_FIRST + 30)
Private Const LVSCW_AUTOSIZE As Long = -1

Private Declare Function SendMessage Lib "user32" _
   Alias "SendMessageA" _
  (ByVal hwnd As Long, _
   ByVal wMsg As Long, _
   ByVal wParam As Long, _
   lParam As Any) As Long

Private Sub Form_Load()

   With ListView1
      .ColumnHeaders.Add , , "DevID"
      .ColumnHeaders.Add , , "Avail"
      .ColumnHeaders.Add , , "AddrWd"
      .ColumnHeaders.Add , , "Status"
      .ColumnHeaders.Add , , "SpdNow"
      .ColumnHeaders.Add , , "SpdMax"
      .ColumnHeaders.Add , , "L2Siz"
      .ColumnHeaders.Add , , "L2Spd"
      .ColumnHeaders.Add , , "VoltCap"
      .ColumnHeaders.Add , , "Name"
      .View = lvwReport
      .Sorted = False
   End With
   Command1.Caption = "Get Adapter Info"

End Sub

Private Sub Command1_Click()

   Call wmiProcessorInfo
   Call lvAutosizeControl(ListView1)
End Sub

Private Sub lvAutosizeControl(lv As ListView)

   Dim col2adjust As Long

  '/* Size each column based on the maximum of
  '/* EITHER the columnheader text width, or,
  '/* if the items below it are wider, the
  '/* widest list item in the column
   For col2adjust = 0 To lv.ColumnHeaders.Count - 1
      Call SendMessage(lv.hwnd, _
                       LVM_SETCOLUMNWIDTH, _
                       col2adjust, _
                       ByVal LVSCW_AUTOSIZE_USEHEADER)

End Sub

Private Sub wmiProcessorInfo()

   Dim cpuSet As SWbemObjectSet
   Dim cpu As SWbemObject
   Dim itmx As ListItem
   Set cpuSet = GetObject("winmgmts:{impersonationLevel=impersonate}"). _
   For Each cpu In cpuSet
      Set itmx = ListView1.ListItems.Add(, , cpu.DeviceID)
      itmx.SubItems(1) = cpu.Availability
      itmx.SubItems(2) = cpu.AddressWidth
      itmx.SubItems(3) = cpu.CpuStatus
      itmx.SubItems(4) = cpu.CurrentClockSpeed
      itmx.SubItems(5) = cpu.MaxClockSpeed
      itmx.SubItems(6) = cpu.L2CacheSize
      itmx.SubItems(7) = cpu.L2CacheSpeed
      itmx.SubItems(8) = cpu.VoltageCaps
      itmx.SubItems(9) = cpu.Name

End Sub
All information returned in the Win32_Processor class (note that some systems may not return information in all class properties):
uint16 AddressWidth
uint16 Architecture
uint16 Availability
string Caption
uint32 ConfigManagerErrorCode
boolean ConfigManagerUserConfig
uint16 CpuStatus
string CreationClassName
uint32 CurrentClockSpeed
uint16 CurrentVoltage
uint16 DataWidth
string Description
string DeviceID
boolean ErrorCleared
string ErrorDescription
uint32 ExtClock
uint16 Family
datetime InstallDate
uint32 L2CacheSize
uint32 L2CacheSpeed
uint32 LastErrorCode
uint16 Level
uint16 LoadPercentage
string Manufacturer
uint32 MaxClockSpeed
string Name
string OtherFamilyDescription
string PNPDeviceID
uint16 PowerManagementCapabilities[]
boolean PowerManagementSupported
string ProcessorId
uint16 ProcessorType
uint16 Revision
string Role
string SocketDesignation
string Status
uint16 StatusInfo
string Stepping
string SystemCreationClassName
string SystemName
string UniqueId
uint16 UpgradeMethod
string Version
uint32 VoltageCaps


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Copyright 1996-2011 VBnet and Randy Birch. All Rights Reserved.
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