WPF Interop TextBox

[Tucalipe]

I'm currently working on a WinForms app, and I've just found out the dropdown area of an autocomplete-enabled textBox cannot have its font size changed. I've read an alternative would be using a WPF element host with an AutoCompleteBox (From WPFToolkit) and use interop to have it shown on my WFA.

Mind it's the very first time I'm working with interop. Originally I had the following textbox:

            AutoCompleteStringCollection coll = new AutoCompleteStringCollection();
            PDV.FDBDataSet.TB_STOCKDataTable dt = new PDV.FDBDataSet.TB_STOCKDataTable();
            tB_STOCKTableAdapter1.Fill(dt);
            foreach (DataRow row in dt)
            {
                //MessageBox.Show(row["DESCRIPTION"].ToString());
                coll.Add(row["DESCRIPTION"].ToString());
                _dt.Add(row["DESCRIPTION"].ToString());
            }
            textBox1.AutoCompleteCustomSource = coll;

And I'd also need this event for future reasons:

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            Regex rgx = new Regex(@"(\d+\*)");
            if (rgx.IsMatch(textBox1.Text))
            {
                txb_Qtde.Text = textBox1.Text.TrimEnd('*');
                textBox1.Clear();
            }
        }

I've managed to add an autocompletebox via interop:

        List<string> _dt = new List<string>();
        private void Caixa_Load(object sender, EventArgs e)
        {
            
            ACBox.FontSize = 16;


            ACBox.FontFamily = new System.Windows.Media.FontFamily("Segoe UI");
            WPFHost1.Child = ACBox;
            ACBox.MinimumPopulateDelay = 100;
            ACBox.MinimumPrefixLength = 1;
            ACBox.ItemsSource = _dt;
        }

However, I'd need to detect changes to the entered text. How can I achieve that through interop?


EDIT:

I manually added

this.ACBox.TextChanged += new System.Windows.RoutedEventHandler(this.ACBox_TextChanged);

Worked flawlessly.
Visual Studio doesn't do everything I need automagically. =)