Guide [Source] BO7 Virtual Controller Aim Base — C# ViGEm & Interception

[byte_corvus]

Virtual controller emulation is still the move for anyone trying to exploit the aggressive aim assist in Black Ops 7. This C# base popped up recently—it's a rough project using the ViGEm bus for X360 emulation and interception.dll to snatch raw mouse data. While the original logic was admittedly pasted with some AI assistance, the technical skeleton is worth a look if you're building your own wrapper.

The Tech Stack:

1. ViGEmClient: Handles the virtual Xbox 360 hardware bus.
2. Interception.dll: Captures raw mouse deltas before the OS (and Ricochet) fully processes them.
3. C# Wrapper: Syncs threads to map high-frequency mouse X/Y to short-based thumbstick axes.
4. Native Methods: Uses ClipCursor to keep the mouse locked while the emulation is hot.

Spoiler: The Source Code

using System;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;
using System.Security.Principal;
using Nefarius.ViGEm.Client;
using Nefarius.ViGEm.Client.Targets;
using Nefarius.ViGEm.Client.Targets.Xbox360;
 
namespace vGamepadPro
{
    public partial class MainWindow : Window
    {
        private static volatile int sharedDeltaX = 0;
        private static volatile int sharedDeltaY = 0;
        public static volatile bool EmulatorActive = false;
 
        private ViGEmClient client;
        private IXbox360Controller xbox;
        private Thread workerThread, interceptThread;
        private volatile bool stopWorker = false;
 
        public MainWindow()
        {
            InitializeComponent();
            if (!IsAdministrator()) { RestartAsAdmin(); return; }
        }
 
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            try
            {
                client = new ViGEmClient();
                xbox = client.CreateXbox360Controller();
                xbox.Connect();
 
                interceptThread = new Thread(InterceptionLoop) { Priority = ThreadPriority.Highest, IsBackground = true };
                interceptThread.Start();
 
                workerThread = new Thread(NuclearWorkerXbox) { Priority = ThreadPriority.Highest, IsBackground = true };
                workerThread.Start();
            }
            catch (Exception ex) { System.Windows.MessageBox.Show("Vigem Error: " + ex.Message); }
        }
 
        private void NuclearWorkerXbox()
        {
            float dpi; using (Graphics g = Graphics.FromHwnd(IntPtr.Zero)) { dpi = g.DpiX / 96f; }
            var bounds = System.Windows.Forms.Screen.PrimaryScreen.Bounds;
            int cx = (int)(bounds.Width * dpi) / 2;
            int cy = (int)(bounds.Height * dpi) / 2;
 
            while (!stopWorker)
            {
                if ((NativeMethods.GetAsyncKeyState(0x2D) & 1) != 0) // INSERT KEY
                {
                    EmulatorActive = !EmulatorActive;
                    if (EmulatorActive) { Console.Beep(1000, 200); LockMouse(cx, cy); }
                    else { Console.Beep(500, 200); UnlockMouse(); }
                    Thread.Sleep(250);
                }
 
                if (!EmulatorActive) { Thread.Sleep(10); continue; }
 
                NativeMethods.SetCursorPos(cx, cy);
                int dx = Interlocked.Exchange(ref sharedDeltaX, 0);
                int dy = Interlocked.Exchange(ref sharedDeltaY, 0);
 
                if (xbox != null)
                {
                    xbox.SetAxisValue(Xbox360Axis.RightThumbX, (short)Math.Clamp(dx * 400, -32767, 32767));
                    xbox.SetAxisValue(Xbox360Axis.RightThumbY, (short)Math.Clamp(-dy * 400, -32767, 32767));
                    xbox.SubmitReport();
                }
                Thread.Sleep(1);
            }
        }
 
        private void InterceptionLoop()
        {
            try
            {
                IntPtr ctx = Interception.interception_create_context();
                Interception.interception_set_filter(ctx, Interception.interception_is_mouse, 0xFFFF);
                Interception.Stroke s = new Interception.Stroke();
                while (!stopWorker)
                {
                    int d = Interception.interception_wait(ctx);
                    if (Interception.interception_receive(ctx, d, ref s, 1) > 0)
                    {
                        if (EmulatorActive)
                        {
                            Interlocked.Add(ref sharedDeltaX, s.mouse.x);
                            Interlocked.Add(ref sharedDeltaY, s.mouse.y);
                        }
                        else Interception.interception_send(ctx, d, ref s, 1);
                    }
                }
            }
            catch { }
        }
 
        private void Close_Click(object s, RoutedEventArgs e) { stopWorker = true; Environment.Exit(0); }
        private void Hide_Click(object s, RoutedEventArgs e) { this.WindowState = WindowState.Minimized; }
        private void Window_MouseDown(object s, MouseButtonEventArgs e) { if (e.ChangedButton == MouseButton.Left) this.DragMove(); }
        private bool IsAdministrator() { return new WindowsPrincipal(WindowsIdentity.GetCurrent()).IsInRole(WindowsBuiltInRole.Administrator); }
        private void RestartAsAdmin() { Process.Start(new ProcessStartInfo { FileName = Process.GetCurrentProcess().MainModule.FileName, UseShellExecute = true, Verb = "runas" }); System.Windows.Application.Current.Shutdown(); }
        static void LockMouse(int cx, int cy) { NativeMethods.RECT r; r.Left = cx; r.Top = cy; r.Right = cx + 1; r.Bottom = cy + 1; NativeMethods.ClipCursor(ref r); }
        static void UnlockMouse() { NativeMethods.ClipCursor(IntPtr.Zero); }
 
        // Required Stubs
        private void Nav_Controller_Click(object s, RoutedEventArgs e) { MainTabs.SelectedIndex = 0; }
        private void Nav_Bindings_Click(object s, RoutedEventArgs e) { MainTabs.SelectedIndex = 1; }
        private void Nav_Macro_Click(object s, RoutedEventArgs e) { MainTabs.SelectedIndex = 2; }
        private void Nav_Settings_Click(object s, RoutedEventArgs e) { MainTabs.SelectedIndex = 3; }
        private void Nav_Profiles_Click(object s, RoutedEventArgs e) { MainTabs.SelectedIndex = 4; }
        private void Setting_Changed(object s, RoutedEventArgs e) { }
        private void Slider_Changed(object s, RoutedPropertyChangedEventArgs<double> e) { }
        private void BtnSaveProfile_Click(object s, RoutedEventArgs e) { }
    }
 
    public static class Interception
    {
        [DllImport("interception.dll", CallingConvention = CallingConvention.Cdecl)] public static extern IntPtr interception_create_context();
        [DllImport("interception.dll", CallingConvention = CallingConvention.Cdecl)] public static extern void interception_set_filter(IntPtr c, InterceptionPredicate p, ushort f);
        [DllImport("interception.dll", CallingConvention = CallingConvention.Cdecl)] public static extern int interception_wait(IntPtr c);
        [DllImport("interception.dll", CallingConvention = CallingConvention.Cdecl)] public static extern int interception_receive(IntPtr c, int d, ref Stroke s, uint n);
        [DllImport("interception.dll", CallingConvention = CallingConvention.Cdecl)] public static extern int interception_send(IntPtr c, int d, ref Stroke s, uint n);
        [DllImport("interception.dll", CallingConvention = CallingConvention.Cdecl)] public static extern int interception_is_mouse(int d);
        public delegate int InterceptionPredicate(int d);
        [StructLayout(LayoutKind.Sequential)] public struct MouseStroke { public ushort state; public ushort flags; public short rolling; public int x; public int y; public uint info; }
        [StructLayout(LayoutKind.Explicit)] public struct Stroke { [FieldOffset(0)] public MouseStroke mouse; }
    }
 
    public static class NativeMethods
    {
        [DllImport("user32.dll")] public static extern short GetAsyncKeyState(int v);
        [DllImport("user32.dll")] public static extern bool SetCursorPos(int x, int y);
        [DllImport("user32.dll")] public static extern bool ClipCursor(ref RECT r);
        [DllImport("user32.dll")] public static extern bool ClipCursor(IntPtr r);
        [StructLayout(LayoutKind.Sequential)] public struct RECT { public int Left; public int Top; public int Right; public int Bottom; }
    }
}

Technical Reality & Troubleshooting:
The author mentioned it doesn't work when hitting the Insert key. If you're building on this, remember that Interception requires a signed driver installation and a reboot. Without the driver, interception_create_context will just return null and the loop will die silently.

Anti-Cheat Warning:
Ricochet has been moving aggressively against virtual input devices. Using ViGEm on a main account is basically begging for a manual review if your movement deltas look like a robot. While others are catching shadow bans with public injectors, Infocheats users should treat this as a learning base for raw input manipulation rather than a plug-and-play solution.

Anyone managed to keep ViGEm seeds UD since the last Ricochet update?