or at least display the current frame number for the cursor location

@hurricane1951 The current frame number is displayed at the bottom of the video preview window.

there must be a way to jump to a specific Frame number as displayed in the timeline

Just wrote a little script that you can try:

using System.Drawing;
using System.Windows.Forms;

using ScriptPortal.Vegas;  // "ScriptPortal.Vegas" for Magix Vegas Pro 14 or above, "Sony.Vegas" for Sony Vegas Pro 13 or below

namespace Test_Script
{
    public class Class
    {
        public Vegas myVegas;
        public void Main(Vegas vegas)
        {
            myVegas = vegas;

            int frameNumber = GetFrameNumber();
            if (frameNumber < 0)
            {
                return;
            }
            myVegas.Transport.CursorPosition = Timecode.FromFrames(frameNumber);
        }

        public int GetFrameNumber()
        {
            Form form = new Form
            {
                ShowInTaskbar = false,
                AutoSize = true,
                BackColor = Color.FromArgb(45, 45, 45),
                ForeColor = Color.FromArgb(200, 200, 200),
                Font = new Font("Arial", 9),
                Text = "Frame",
                FormBorderStyle = FormBorderStyle.FixedToolWindow,
                StartPosition = FormStartPosition.CenterScreen,
                AutoSizeMode = AutoSizeMode.GrowAndShrink
            };

            Panel p = new Panel
            {
                AutoSize = true,
                AutoSizeMode = AutoSizeMode.GrowAndShrink
            };
            form.Controls.Add(p);

            TableLayoutPanel l = new TableLayoutPanel
            {
                AutoSize = true,
                AutoSizeMode = AutoSizeMode.GrowAndShrink,
                GrowStyle = TableLayoutPanelGrowStyle.AddRows,
                ColumnCount = 1
            };
            p.Controls.Add(l);

            TextBox tb = new TextBox
            {
                AutoSize = true,
                Dock = DockStyle.Fill,
                Margin = new Padding(12, 12, 12, 4)
            };
            l.Controls.Add(tb);

            Button ok = new Button
            {
                Font = new Font("Arial", 8),
                Text = "OK",
                Dock = DockStyle.Fill,
                Margin = new Padding(24, 4, 24, 6),
                DialogResult = DialogResult.OK
            };
            l.Controls.Add(ok);
            form.AcceptButton = ok;

            int value;
            if (form.ShowDialog(myVegas.MainWindow) != DialogResult.OK || !int.TryParse(tb.Text, out value))
            {
                value = -1;
            }
            return value;
        }
    }
}

public class EntryPoint
{
    public void FromVegas(Vegas vegas)
    //public void FromVegas(Vegas vegas, String scriptFile, XmlDocument scriptSettings, ScriptArgs args)
    {
        Test_Script.Class test = new Test_Script.Class();
        test.Main(vegas);
    }
}