Public Function GetPropertyGuid( _
   ByVal item As Object, _
   ByVal propertyIdName As String, _
   ByVal propertyId As WiaPropertyId _
) As Guid

Dim instance As WiaSession
Dim item As Object
Dim propertyIdName As String
Dim propertyId As WiaPropertyId
Dim value As Guid
 
value = instance.GetPropertyGuid(item, propertyIdName, propertyId)

public Guid GetPropertyGuid( 
   object item,
   string propertyIdName,
   WiaPropertyId propertyId
)

public:
Guid GetPropertyGuid( 
   Object^ item,
   String^ propertyIdName,
   WiaPropertyId propertyId
) 

Dim mySession As WiaSession
Public Sub GetPropertyGuidExample(ByVal parent As IWin32Window)
   If (Not WiaSession.IsAvailable(WiaVersion.Version1)) Then
      MessageBox.Show("WIA version 1.0 not installed.")
      Return
   End If

   mySession = New WiaSession()
   mySession.Startup(WiaVersion.Version1)

   Dim res As DialogResult = mySession.SelectDeviceDlg(parent, WiaDeviceType.Default, WiaSelectSourceFlags.NoDefault)
   If res <> DialogResult.OK Then
      MessageBox.Show("Error selecting WIA device.")
      mySession.Shutdown()
      Return
   End If

   Dim rootItem As Object = mySession.GetRootItem(Nothing)
   If Not rootItem Is Nothing Then
      AddHandler mySession.EnumItemsEvent, AddressOf session_EnumItemsEvent3

      mySession.EnumChildItems(rootItem)

      RemoveHandler mySession.EnumItemsEvent, AddressOf session_EnumItemsEvent3
   End If

   mySession.Shutdown()
End Sub

Private Sub session_EnumItemsEvent3(ByVal sender As Object, ByVal e As WiaEnumItemsEventArgs)
   Dim found As Boolean = False

   If Not e.Item Is Nothing Then
      ' Read the item category property (this property is only available for WIA 2.0).
      Dim sessionCategoryGuid As Guid = mySession.GetPropertyGuid(e.Item, Nothing, WiaPropertyId.ItemCategory)

      ' Find the related item category for the received GUID.
      Dim categoryGuid As Guid = wiaSession.GetCategoryGuid(WiaCategories.Feeder)
      If categoryGuid = sessionCategoryGuid Then ' the item is a Feeder.
         Console.WriteLine("Item category: Feeder")
         found = True
      End If

      If found = False Then
         categoryGuid = wiaSession.GetCategoryGuid(WiaCategories.FeederBack)
         If categoryGuid = sessionCategoryGuid Then ' the item is a Feeder.
            Console.WriteLine("Item category: FeederBack")
            found = True
         End If
      End If

      If found = False Then
         categoryGuid = wiaSession.GetCategoryGuid(WiaCategories.FeederFront)
         If categoryGuid = sessionCategoryGuid Then ' the item is a Feeder.
            Console.WriteLine("Item category: FeederFront")
            found = True
         End If
      End If

      If found = False Then
         categoryGuid = wiaSession.GetCategoryGuid(WiaCategories.Film)
         If categoryGuid = sessionCategoryGuid Then ' the item is a Feeder.
            Console.WriteLine("Item category: Film")
            found = True
         End If
      End If

      If found = False Then
         categoryGuid = wiaSession.GetCategoryGuid(WiaCategories.FinishedFile)
         If categoryGuid = sessionCategoryGuid Then ' the item is a Feeder.
            Console.WriteLine("Item category: FinishedFile")
            found = True
         End If
      End If

      If found = False Then
         categoryGuid = wiaSession.GetCategoryGuid(WiaCategories.Flatbed)
         If categoryGuid = sessionCategoryGuid Then ' the item is a Feeder.
            Console.WriteLine("Item category: Flatbed")
            found = True
         End If
      End If

      If found = False Then
         categoryGuid = wiaSession.GetCategoryGuid(WiaCategories.Folder)
         If categoryGuid = sessionCategoryGuid Then ' the item is a Feeder.
            Console.WriteLine("Item category: Folder")
            found = True
         End If
      End If

      If found = False Then
         categoryGuid = wiaSession.GetCategoryGuid(WiaCategories.Root)
         If categoryGuid = sessionCategoryGuid Then ' the item is a Feeder.
            Console.WriteLine("Item category: Root")
            found = True
         End If
      End If

      session.FreeItem(e.Item)
   End If
End Sub

WiaSession mySession;
public void GetPropertyGuidExample(IWin32Window parent)
{
   if (!WiaSession.IsAvailable(WiaVersion.Version1))
   {
      MessageBox.Show("WIA version 1.0 not installed.");
      return;
   }

   mySession = new WiaSession();
   mySession.Startup(WiaVersion.Version1);

   DialogResult res = mySession.SelectDeviceDlg(parent, WiaDeviceType.Default, WiaSelectSourceFlags.NoDefault);
   if (res != DialogResult.OK)
   {
      MessageBox.Show("Error selecting WIA device.");
      mySession.Shutdown();
      return;
   }

   object rootItem = mySession.GetRootItem(null);
   if (rootItem != null)
   {
      mySession.EnumItemsEvent += new EventHandler<WiaEnumItemsEventArgs>(wiaSession_EnumItemsEvent3);

      mySession.EnumChildItems(rootItem);

      mySession.EnumItemsEvent -= new EventHandler<WiaEnumItemsEventArgs>(wiaSession_EnumItemsEvent3);
   }

   mySession.Shutdown();
}

void wiaSession_EnumItemsEvent3(object sender, WiaEnumItemsEventArgs e)
{
   bool found = false;

   if (e.Item != null)
   {
      // Read the item category property (this property is only available for WIA 2.0).
      Guid sessionCategoryGuid = mySession.GetPropertyGuid(e.Item, null, WiaPropertyId.ItemCategory);

      // Find the related item category for the received Guid.
      Guid categoryGuid = WiaSession.GetCategoryGuid(WiaCategories.Feeder);
      if(categoryGuid == sessionCategoryGuid)   // the item is a Feeder.
      {
         Console.WriteLine("Item category: Feeder");
         found = true;
      }

      if (found == false)
      {
         categoryGuid = WiaSession.GetCategoryGuid(WiaCategories.FeederBack);
         if(categoryGuid == sessionCategoryGuid)   // the item is a Feeder.
         {
            Console.WriteLine("Item category: FeederBack");
            found = true;
         }
      }

      if (found == false)
      {
         categoryGuid = WiaSession.GetCategoryGuid(WiaCategories.FeederFront);
         if(categoryGuid == sessionCategoryGuid)   // the item is a Feeder.
         {
            Console.WriteLine("Item category: FeederFront");
            found = true;
         }
      }

      if (found == false)
      {
         categoryGuid = WiaSession.GetCategoryGuid(WiaCategories.Film);
         if(categoryGuid == sessionCategoryGuid)   // the item is a Feeder.
         {
            Console.WriteLine("Item category: Film");
            found = true;
         }
      }

      if (found == false)
      {
         categoryGuid = WiaSession.GetCategoryGuid(WiaCategories.FinishedFile);
         if(categoryGuid == sessionCategoryGuid)   // the item is a Feeder.
         {
            Console.WriteLine("Item category: FinishedFile");
            found = true;
         }
      }

      if (found == false)
      {
         categoryGuid = WiaSession.GetCategoryGuid(WiaCategories.Flatbed);
         if(categoryGuid == sessionCategoryGuid)   // the item is a Feeder.
         {
            Console.WriteLine("Item category: Flatbed");
            found = true;
         }
      }

      if (found == false)
      {
         categoryGuid = WiaSession.GetCategoryGuid(WiaCategories.Folder);
         if(categoryGuid == sessionCategoryGuid)   // the item is a Feeder.
         {
            Console.WriteLine("Item category: Folder");
            found = true;
         }
      }

      if (found == false)
      {
         categoryGuid = WiaSession.GetCategoryGuid(WiaCategories.Root);
         if(categoryGuid == sessionCategoryGuid)   // the item is a Feeder.
         {
            Console.WriteLine("Item category: Root");
            found = true;
         }
      }

      mySession.FreeItem(e.Item);
   }
}