HarddiskVolume code example

Example: HarddiskVolume

# Biuild System Assembly in order to call Kernel32:QueryDosDevice. 
   $DynAssembly = New-Object System.Reflection.AssemblyName('SysUtils')
   $AssemblyBuilder = [AppDomain]::CurrentDomain.DefineDynamicAssembly($DynAssembly, [Reflection.Emit.AssemblyBuilderAccess]::Run)
   $ModuleBuilder = $AssemblyBuilder.DefineDynamicModule('SysUtils', $False)

   # Define [Kernel32]::QueryDosDevice method
   $TypeBuilder = $ModuleBuilder.DefineType('Kernel32', 'Public, Class')
   $PInvokeMethod = $TypeBuilder.DefinePInvokeMethod('QueryDosDevice', 'kernel32.dll', ([Reflection.MethodAttributes]::Public -bor [Reflection.MethodAttributes]::Static), [Reflection.CallingConventions]::Standard, [UInt32], [Type[]]@([String], [Text.StringBuilder], [UInt32]), [Runtime.InteropServices.CallingConvention]::Winapi, [Runtime.InteropServices.CharSet]::Auto)
   $DllImportConstructor = [Runtime.InteropServices.DllImportAttribute].GetConstructor(@([String]))
   $SetLastError = [Runtime.InteropServices.DllImportAttribute].GetField('SetLastError')
   $SetLastErrorCustomAttribute = New-Object Reflection.Emit.CustomAttributeBuilder($DllImportConstructor, @('kernel32.dll'), [Reflection.FieldInfo[]]@($SetLastError), @($true))
   $PInvokeMethod.SetCustomAttribute($SetLastErrorCustomAttribute)
   $Kernel32 = $TypeBuilder.CreateType()

   $Max = 65536
   $StringBuilder = New-Object System.Text.StringBuilder($Max)

   Get-WmiObject Win32_Volume | ? { $_.DriveLetter } | % {
       $ReturnLength = $Kernel32::QueryDosDevice($_.DriveLetter, $StringBuilder, $Max)

       if ($ReturnLength)
       {
           $DriveMapping = @{
               DriveLetter = $_.DriveLetter
               DevicePath = $StringBuilder.ToString()
           }

           New-Object PSObject -Property $DriveMapping
       }
   }