สอบถามหน่อยครับ การค้นหา Control บน Winapp มีวิธีการทำหรือป่าวครับ

private void Form1_Load(object sender, EventArgs e)
        {
            this.WindowState = FormWindowState.Maximized;
            this.AutoScroll = true;
            string valSearch = string.Empty;
            DialogResult valResult;

            Button vButton;
            vButton = new Button() { Location = new Point(150, 10), Size = new Size(1000, 40), Text = "ค้นหาปุ่ม" };
            vButton.Click += delegate(System.Object ob, System.EventArgs ev) {
                foreach (Button b in this.Controls)
                {
                    b.BackColor = DefaultBackColor;

                }
                valResult = InputBox("ค้นหาปุ่ม", "กรุณากรอกตัวเลขที่ต้องการจะค้นหา", ref valSearch);
                if (valResult == System.Windows.Forms.DialogResult.OK)
                {
                    var bResult = (from b in this.Controls.Cast<Button>()
                                   where b.Text == valSearch
                                   select b);
                    foreach (Button b in bResult)
                    {
                        b.BackColor = Color.Red;
                    }
                }
            };
            this.Controls.Add(vButton);

            int valCount = 1;
            for (byte y = 1; y <= 9; y++)
            {
                for (byte x = 1; x <= 16; x++)
                {
                    vButton = new Button() { Location = new Point(70 * x, 70 * y) , Size = new Size(50,50) , Text = valCount.ToString()};
                    this.Controls.Add(vButton);
                    valCount++;

                }
            }

            
        }



        public static DialogResult InputBox(string title, string promptText, ref string value)
        {
            Form form = new Form();
            Label label = new Label();
            TextBox textBox = new TextBox();
            Button buttonOk = new Button();
            Button buttonCancel = new Button();

            form.Text = title;
            label.Text = promptText;
            textBox.Text = value;

            buttonOk.Text = "OK";
            buttonCancel.Text = "Cancel";
            buttonOk.DialogResult = DialogResult.OK;
            buttonCancel.DialogResult = DialogResult.Cancel;

            label.SetBounds(9, 20, 372, 13);
            textBox.SetBounds(12, 36, 372, 20);
            buttonOk.SetBounds(228, 72, 75, 23);
            buttonCancel.SetBounds(309, 72, 75, 23);

            label.AutoSize = true;
            textBox.Anchor = textBox.Anchor | AnchorStyles.Right;
            buttonOk.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
            buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;

            form.ClientSize = new Size(396, 107);
            form.Controls.AddRange(new Control[] { label, textBox, buttonOk, buttonCancel });
            form.ClientSize = new Size(Math.Max(300, label.Right + 10), form.ClientSize.Height);
            form.FormBorderStyle = FormBorderStyle.FixedDialog;
            form.StartPosition = FormStartPosition.CenterScreen;
            form.MinimizeBox = false;
            form.MaximizeBox = false;
            form.AcceptButton = buttonOk;
            form.CancelButton = buttonCancel;

            DialogResult dialogResult = form.ShowDialog();
            value = textBox.Text;
            return dialogResult;
        }

var bResult = (from b in this.Controls.Cast<Button>()
                                   where b.Text == valSearch
                                   select b);
                    foreach (Button b in bResult)

 Dim bResult = (From b In Me.Controls.Cast(Of Button)() Where b.TAG = valSearchb)

 Dim C() As Control
        C = Me.Controls.Find(TextBox1.Text, False)
        For i As Integer = 0 To C.Length - 1
            C(i).Focus()
            C(i).BackColor = Color.Black
        Next