chore: import upstream snapshot with attribution

samples/driver/multi-cursor/dotnet/winforms/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Windows.Forms;
+
+// "Meridian CRM — Account Record" : WinForms node (classic Win32 controls,
+// MSAA/UIA). Explicit fractional layout (dense, no gaps beyond borders).
+// cua-driver drives the Account Name field + the "Add Record" button.
+static class Program
+{
+    [STAThread]
+    static void Main()
+    {
+        Application.EnableVisualStyles();
+        Application.SetCompatibleTextRenderingDefault(false);
+
+        var f = new Form { Text = "Meridian CRM — Account Record [WinForms]", ClientSize = new Size(960, 600),
+            StartPosition = FormStartPosition.Manual, Font = new Font("Segoe UI", 9f), BackColor = Color.FromArgb(240,240,240) };
+
+        Label band(string t, Color bg, ContentAlignment a = ContentAlignment.MiddleLeft, FontStyle fs = FontStyle.Regular)
+            => new Label { Text = t, BackColor = bg, TextAlign = a, Font = new Font("Segoe UI", 9f, fs) };
+
+        var menu = band("  File      Edit      View      Record      Tools      Help", Color.FromArgb(247,247,247));
+        var tool = band("  New      Open      Save      Delete       │       ◀ Prev      Next ▶       │       Find", Color.FromArgb(235,235,235));
+        var nameLbl = band(" Account Name", Color.FromArgb(240,240,240));
+        var typeLbl = band(" Account Type", Color.FromArgb(240,240,240));
+        var regionLbl = band(" Region", Color.FromArgb(240,240,240));
+        var prioLbl = band(" Priority (1-5)", Color.FromArgb(240,240,240));
+        var creditLbl = band(" Credit Limit", Color.FromArgb(240,240,240));
+        var nameBox = new TextBox { BorderStyle = BorderStyle.FixedSingle };
+        var typeCmb = new ComboBox { DropDownStyle = ComboBoxStyle.DropDownList, FlatStyle = FlatStyle.Flat };
+        typeCmb.Items.AddRange(new object[] { "Enterprise", "SMB", "Government", "Reseller" }); typeCmb.SelectedIndex = 0;
+        var regionCmb = new ComboBox { DropDownStyle = ComboBoxStyle.DropDownList, FlatStyle = FlatStyle.Flat };
+        regionCmb.Items.AddRange(new object[] { "North", "South", "EMEA", "APAC", "LATAM" }); regionCmb.SelectedIndex = 0;
+        var prio = new TrackBar { Minimum = 1, Maximum = 5, Value = 3, TickStyle = TickStyle.BottomRight };
+        var credit = new TrackBar { Minimum = 0, Maximum = 100, Value = 40, TickFrequency = 10, TickStyle = TickStyle.BottomRight };
+        var saveBtn = new Button { Text = "Add Record", FlatStyle = FlatStyle.System, Font = new Font("Segoe UI", 10f, FontStyle.Bold) };
+        var sigHdr = band(" Signature / Notes", Color.FromArgb(225,225,225), ContentAlignment.MiddleLeft, FontStyle.Bold);
+        var sig = new Panel { BackColor = Color.White, BorderStyle = BorderStyle.FixedSingle };
+        var grid = new DataGridView { AllowUserToAddRows = false, ReadOnly = true, BackgroundColor = Color.White,
+            BorderStyle = BorderStyle.FixedSingle, RowHeadersVisible = false, AllowUserToResizeRows = false,
+            ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.DisableResizing };
+        grid.Columns.Add("acct", "Account"); grid.Columns.Add("type", "Type"); grid.Columns.Add("region", "Region");
+        grid.Columns.Add("pri", "Pri"); grid.Columns.Add("credit", "Credit");
+        grid.Columns["acct"].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
+        var status = band("  Ready", Color.FromArgb(232,232,232));
+        var recLbl = band("Records: 0   USER: SYSTEM ▌ CONNECTED  ", Color.FromArgb(232,232,232), ContentAlignment.MiddleRight);
+
+        // line tool: one straight segment per press-drag-release (down→up)
+        var segs = new List<(Point a, Point b)>(); Point? down = null; Point cur = Point.Empty;
+        sig.MouseDown += (s, e) => { down = e.Location; cur = e.Location; };
+        sig.MouseMove += (s, e) => { if (down != null) { cur = e.Location; sig.Invalidate(); } };
+        sig.MouseUp += (s, e) => { if (down != null) { segs.Add((down.Value, e.Location)); down = null; sig.Invalidate(); } };
+        sig.Paint += (s, e) => { e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
+            using var p = new Pen(Color.MidnightBlue, 2); foreach (var sg in segs) e.Graphics.DrawLine(p, sg.a, sg.b);
+            if (down != null) { using var pp = new Pen(Color.FromArgb(110, 25, 25, 112), 1); e.Graphics.DrawLine(pp, down.Value, cur); } };
+
+        int records = 0;
+        saveBtn.Click += (s, e) =>
+        {
+            string nm = nameBox.Text.Trim(); if (nm.Length == 0) nm = "(unnamed)";
+            grid.Rows.Add(nm, typeCmb.Text, regionCmb.Text, prio.Value, "$" + (credit.Value * 1000));
+            if (grid.Rows.Count > 0) grid.FirstDisplayedScrollingRowIndex = grid.Rows.Count - 1;
+            records++; status.Text = $"  Saved account '{nm}'."; recLbl.Text = $"Records: {records}   USER: SYSTEM ▌ CONNECTED  ";
+            nameBox.Clear();
+        };
+
+        foreach (Control c in new Control[] { menu, tool, nameLbl, typeLbl, regionLbl, prioLbl, creditLbl,
+            nameBox, typeCmb, regionCmb, prio, credit, saveBtn, sigHdr, sig, grid, status, recLbl })
+            f.Controls.Add(c);
+
+        void Layout()
+        {
+            int W = f.ClientSize.Width, H = f.ClientSize.Height;
+            int X(double a) => (int)(W * a); int Y(double a) => (int)(H * a);
+            Rectangle R(double x0, double y0, double x1, double y1) => Rectangle.FromLTRB(X(x0), Y(y0), X(x1), Y(y1));
+            menu.Bounds = R(0, 0, 1, 0.045);
+            tool.Bounds = R(0, 0.045, 1, 0.095);
+            double lc = 0.13; // label/control split
+            nameLbl.Bounds = R(0, 0.105, lc, 0.16);   nameBox.Bounds = R(lc, 0.105, 0.42, 0.16);
+            typeLbl.Bounds = R(0, 0.165, lc, 0.22);    typeCmb.Bounds = R(lc, 0.167, 0.42, 0.22);
+            regionLbl.Bounds = R(0, 0.225, lc, 0.28);  regionCmb.Bounds = R(lc, 0.227, 0.42, 0.28);
+            prioLbl.Bounds = R(0, 0.285, lc, 0.345);   prio.Bounds = R(lc, 0.285, 0.42, 0.345);
+            creditLbl.Bounds = R(0, 0.35, lc, 0.41);   credit.Bounds = R(lc, 0.35, 0.42, 0.41);
+            saveBtn.Bounds = R(0.04, 0.45, 0.40, 0.52);
+            sigHdr.Bounds = R(0.42, 0.095, 1, 0.135);
+            sig.Bounds = R(0.42, 0.135, 0.995, 0.42);
+            grid.Bounds = R(0.005, 0.55, 0.995, 0.93);
+            status.Bounds = R(0, 0.94, 0.5, 1);
+            recLbl.Bounds = R(0.5, 0.94, 1, 1);
+            float gfs = Math.Max(8, H / 70f);
+            grid.Font = new Font("Segoe UI", gfs);
+            grid.ColumnHeadersDefaultCellStyle.Font = new Font("Segoe UI", gfs, FontStyle.Bold);
+        }
+        f.Load += (s, e) => Layout();
+        f.Resize += (s, e) => Layout();
+        Application.Run(f);
+    }
+}

samples/driver/multi-cursor/dotnet/winforms/winforms.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net10.0-windows</TargetFramework>
+    <UseWindowsForms>true</UseWindowsForms>
+    <Nullable>disable</Nullable>
+    <ImplicitUsings>disable</ImplicitUsings>
+    <AssemblyName>winforms-legacy</AssemblyName>
+    <ApplicationHighDpiMode>PerMonitorV2</ApplicationHighDpiMode>
+  </PropertyGroup>
+</Project>

samples/driver/multi-cursor/dotnet/wpf/Program.cs

@@ -0,0 +1,131 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Media;
+using System.Windows.Shapes;
+
+// "Meridian CRM — Account Record" : WPF node (XAML / UIA). Real Slider /
+// ComboBox / InkCanvas (doodle) / DataGrid (spreadsheet). Account Name TextBox
+// + SAVE button are what cua-driver drives.
+class Program
+{
+    public class RowVM
+    {
+        public string Account { get; set; } public string Type { get; set; }
+        public string Region { get; set; } public int Pri { get; set; } public string Credit { get; set; }
+    }
+
+    [STAThread]
+    static void Main()
+    {
+        var app = new Application();
+        var rows = new ObservableCollection<RowVM>();
+        var gray = new SolidColorBrush(Color.FromRgb(0xE0, 0xE0, 0xE0));
+
+        // menu
+        var menu = new Menu();
+        foreach (var m in new[] { "File", "Edit", "View", "Record", "Tools", "Help" })
+            menu.Items.Add(new MenuItem { Header = m });
+        // toolbar
+        var tray = new ToolBarTray();
+        var tb = new ToolBar();
+        foreach (var t in new[] { "New", "Open", "Save", "Delete", "|", "◀ Prev", "Next ▶", "|", "Find" })
+            tb.Items.Add(t == "|" ? (object)new Separator() : new Button { Content = t, Padding = new Thickness(6, 1, 6, 1) });
+        tray.ToolBars.Add(tb);
+
+        // ── left form (dense grid; cell borders only) ───────────────────────
+        var form = new Grid { Background = Brushes.White };
+        form.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(120) });
+        form.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
+        TextBlock lbl(string t) => new TextBlock { Text = " " + t, VerticalAlignment = VerticalAlignment.Center, Background = new SolidColorBrush(Color.FromRgb(0xF0, 0xF0, 0xF0)) };
+        int r = 0;
+        void AddRow(string label, FrameworkElement c, double h = 30)
+        {
+            form.RowDefinitions.Add(new RowDefinition { Height = new GridLength(h) });
+            var b1 = new Border { BorderBrush = gray, BorderThickness = new Thickness(0, 0, 1, 1), Child = lbl(label) };
+            Grid.SetRow(b1, r); Grid.SetColumn(b1, 0); form.Children.Add(b1);
+            var b2 = new Border { BorderBrush = gray, BorderThickness = new Thickness(0, 0, 0, 1), Child = c };
+            Grid.SetRow(b2, r); Grid.SetColumn(b2, 1); form.Children.Add(b2);
+            r++;
+        }
+        var nameBox = new TextBox { BorderThickness = new Thickness(0), VerticalContentAlignment = VerticalAlignment.Center };
+        var typeCmb = new ComboBox { BorderThickness = new Thickness(0) };
+        foreach (var s in new[] { "Enterprise", "SMB", "Government", "Reseller" }) typeCmb.Items.Add(s); typeCmb.SelectedIndex = 0;
+        var regionCmb = new ComboBox { BorderThickness = new Thickness(0) };
+        foreach (var s in new[] { "North", "South", "EMEA", "APAC", "LATAM" }) regionCmb.Items.Add(s); regionCmb.SelectedIndex = 0;
+        var priority = new Slider { Minimum = 1, Maximum = 5, Value = 3, TickFrequency = 1, IsSnapToTickEnabled = true, TickPlacement = TickPlacement.BottomRight, VerticalAlignment = VerticalAlignment.Center };
+        var credit = new Slider { Minimum = 0, Maximum = 100, Value = 40, TickFrequency = 10, TickPlacement = TickPlacement.BottomRight, VerticalAlignment = VerticalAlignment.Center };
+        AddRow("Account Name", nameBox);
+        AddRow("Account Type", typeCmb);
+        AddRow("Region", regionCmb);
+        AddRow("Priority (1-5)", priority);
+        AddRow("Credit Limit", credit);
+        var saveBtn = new Button { Content = "Add Record", FontWeight = FontWeights.Bold };
+        form.RowDefinitions.Add(new RowDefinition { Height = new GridLength(40) });
+        Grid.SetRow(saveBtn, r); Grid.SetColumn(saveBtn, 0); Grid.SetColumnSpan(saveBtn, 2); form.Children.Add(saveBtn);
+
+        // ── right top: line-tool sketch (one straight segment per drag) ─────
+        var ink = new Canvas { Background = Brushes.White, ClipToBounds = true };
+        Point? dn = null; Line preview = null;
+        ink.MouseLeftButtonDown += (s, e) => { dn = e.GetPosition(ink); };
+        ink.MouseMove += (s, e) => { if (dn != null) { var p = e.GetPosition(ink);
+            if (preview == null) { preview = new Line { Stroke = Brushes.MidnightBlue, StrokeThickness = 1, Opacity = 0.45 }; ink.Children.Add(preview); }
+            preview.X1 = dn.Value.X; preview.Y1 = dn.Value.Y; preview.X2 = p.X; preview.Y2 = p.Y; } };
+        ink.MouseLeftButtonUp += (s, e) => { if (dn != null) { var p = e.GetPosition(ink);
+            ink.Children.Add(new Line { Stroke = Brushes.MidnightBlue, StrokeThickness = 2, X1 = dn.Value.X, Y1 = dn.Value.Y, X2 = p.X, Y2 = p.Y });
+            if (preview != null) { ink.Children.Remove(preview); preview = null; }
+            dn = null; } };
+        var sigHdr = new TextBlock { Text = " Signature / Notes", FontWeight = FontWeights.Bold, Background = new SolidColorBrush(Color.FromRgb(0xE1,0xE1,0xE1)), Padding = new Thickness(2) };
+        var sigDock = new DockPanel(); DockPanel.SetDock(sigHdr, Dock.Top); sigDock.Children.Add(sigHdr); sigDock.Children.Add(ink);
+
+        // ── right bottom: spreadsheet ───────────────────────────────────────
+        var dg = new DataGrid { AutoGenerateColumns = false, ItemsSource = rows, IsReadOnly = true, GridLinesVisibility = DataGridGridLinesVisibility.All, HeadersVisibility = DataGridHeadersVisibility.Column };
+        dg.Columns.Add(new DataGridTextColumn { Header = "Account", Binding = new System.Windows.Data.Binding("Account"), Width = new DataGridLength(1, DataGridLengthUnitType.Star) });
+        dg.Columns.Add(new DataGridTextColumn { Header = "Type", Binding = new System.Windows.Data.Binding("Type") });
+        dg.Columns.Add(new DataGridTextColumn { Header = "Region", Binding = new System.Windows.Data.Binding("Region") });
+        dg.Columns.Add(new DataGridTextColumn { Header = "Pri", Binding = new System.Windows.Data.Binding("Pri") });
+        dg.Columns.Add(new DataGridTextColumn { Header = "Credit", Binding = new System.Windows.Data.Binding("Credit") });
+
+        var rightGrid = new Grid();
+        rightGrid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(150) });
+        rightGrid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(3) });
+        rightGrid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
+        Grid.SetRow(sigDock, 0); rightGrid.Children.Add(sigDock);
+        var gs2 = new GridSplitter { Height = 3, HorizontalAlignment = HorizontalAlignment.Stretch, Background = gray }; Grid.SetRow(gs2, 1); rightGrid.Children.Add(gs2);
+        Grid.SetRow(dg, 2); rightGrid.Children.Add(dg);
+
+        var main = new Grid();
+        main.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(380) });
+        main.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(3) });
+        main.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
+        Grid.SetColumn(form, 0); main.Children.Add(form);
+        var gs1 = new GridSplitter { Width = 3, Background = gray }; Grid.SetColumn(gs1, 1); main.Children.Add(gs1);
+        Grid.SetColumn(rightGrid, 2); main.Children.Add(rightGrid);
+
+        // status bar
+        var statusBar = new StatusBar();
+        var statusLbl = new StatusBarItem { Content = "Ready" };
+        var recLbl = new StatusBarItem { Content = "Records: 0", HorizontalAlignment = HorizontalAlignment.Right };
+        statusBar.Items.Add(statusLbl);
+        statusBar.Items.Add(new StatusBarItem { Content = "USER: SYSTEM  ▌ CONNECTED", HorizontalAlignment = HorizontalAlignment.Right });
+        statusBar.Items.Add(recLbl);
+
+        int records = 0;
+        saveBtn.Click += (s, e) =>
+        {
+            string nm = (nameBox.Text ?? "").Trim(); if (nm.Length == 0) nm = "(unnamed)";
+            rows.Add(new RowVM { Account = nm, Type = typeCmb.Text, Region = regionCmb.Text, Pri = (int)priority.Value, Credit = "$" + ((int)credit.Value * 1000) });
+            records++; recLbl.Content = $"Records: {records}"; statusLbl.Content = $"Saved account '{nm}'.";
+            nameBox.Text = "";
+        };
+
+        var dock = new DockPanel();
+        DockPanel.SetDock(menu, Dock.Top); DockPanel.SetDock(tray, Dock.Top); DockPanel.SetDock(statusBar, Dock.Bottom);
+        dock.Children.Add(menu); dock.Children.Add(tray); dock.Children.Add(statusBar); dock.Children.Add(main);
+
+        var win = new Window { Title = "Meridian CRM — Account Record [WPF]", Width = 960, Height = 600, Content = dock, WindowStartupLocation = WindowStartupLocation.Manual };
+        app.Run(win);
+    }
+}

samples/driver/multi-cursor/dotnet/wpf/wpf.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net10.0-windows</TargetFramework>
+    <UseWPF>true</UseWPF>
+    <Nullable>disable</Nullable>
+    <ImplicitUsings>disable</ImplicitUsings>
+    <AssemblyName>wpf-legacy</AssemblyName>
+    <EnableDefaultApplicationDefinition>false</EnableDefaultApplicationDefinition>
+  </PropertyGroup>
+</Project>