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| Title | Get mother board serial numbers and CPU IDs in Visual Basic .NET |
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| Description | This example shows how to use WMI to get mother board serial numbers and CPU IDs in Visual Basic .NET. |
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| Keywords | serial number, cpu, cpu id, WMI, Windows Management Instrumentation, Visual Basic .NET, VB.NET |
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| Categories | Software Engineering, Windows, Miscellany |
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The following function gets a WMI object and then gets a collection of WMI_BaseBoard objects representing the system's mother boards. It loops through them getting their serial numbers.
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Private Function SystemSerialNumber() As String
' Get the Windows Management Instrumentation object.
Dim wmi As Object = GetObject("WinMgmts:")
' Get the "base boards" (mother boards).
Dim serial_numbers As String = ""
Dim mother_boards As Object = _
wmi.InstancesOf("Win32_BaseBoard")
For Each board As Object In mother_boards
serial_numbers &= ", " & board.SerialNumber
Next board
If serial_numbers.Length > 0 Then serial_numbers = _
serial_numbers.Substring(2)
Return serial_numbers
End Function
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The following code gets a WMI object and selects Win32_Processor objects. It loops through them getting their processor IDs.
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Private Function CpuId() As String
Dim computer As String = "."
Dim wmi As Object = GetObject("winmgmts:" & _
"{impersonationLevel=impersonate}!\\" & _
computer & "\root\cimv2")
Dim processors As Object = wmi.ExecQuery("Select * from " & _
"Win32_Processor")
Dim cpu_ids As String = ""
For Each cpu As Object In processors
cpu_ids = cpu_ids & ", " & cpu.ProcessorId
Next cpu
If cpu_ids.Length > 0 Then cpu_ids = _
cpu_ids.Substring(2)
Return cpu_ids
End Function
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