Black screen when capturing from multiple clients about direct3dhook HOT 8 OPEN

Bitmap bmp;

private void Form1_Load(object sender, EventArgs e)
{
    InjectToClient();
}

private void timerLoop_Tick(object sender, EventArgs e)
{
    CaptureImage();
    // Check if a given image is in the game taken screenshot by Direct3DHook (bmp)
}

int processId = 0;
Process _process;
CaptureProcess _captureProcess;
private bool AttachProcess()
{
    // Skip if the process is already hooked (and we want to hook multiple applications)
    if (HookManager.IsHooked(process.Id))
    {
        return false;
    }

    Direct3DVersion direct3DVersion = Direct3DVersion.AutoDetect;

    CaptureConfig cc = new CaptureConfig()
    {
        Direct3DVersion = direct3DVersion,
        ShowOverlay = false
    };

    processId = process.Id;
    _process = process;

    var captureInterface = new CaptureInterface();
    captureInterface.RemoteMessage += new MessageReceivedEvent(CaptureInterface_RemoteMessage);
    _captureProcess = new CaptureProcess(process, cc, captureInterface);

    Thread.Sleep(10);

    if (_captureProcess == null)
    {
        WriteLog("No executable found");
    }

    return true;
}

/// <summary>
/// Display messages from the target process
/// </summary>
/// <param name="message"></param>
void CaptureInterface_RemoteMessage(MessageReceivedEventArgs message)
{
    txtDebugLog.Invoke(new MethodInvoker(delegate ()
        {
            txtDebugLog.Text = String.Format("{0}\r\n{1}", message, txtDebugLog.Text);
        })
    );
}

/// <summary>
/// Display debug messages from the target process
/// </summary>
/// <param name="clientPID"></param>
/// <param name="message"></param>
void ScreenshotManager_OnScreenshotDebugMessage(int clientPID, string message)
{
    txtDebugLog.Invoke(new MethodInvoker(delegate ()
        {
            txtDebugLog.Text = String.Format("{0}:{1}\r\n{2}", clientPID, message, txtDebugLog.Text);
        })
    );
}

DateTime start;

private void CaptureImage()
{
    start = DateTime.Now;
    progressBar1.Maximum = 1;
    progressBar1.Step = 1;
    progressBar1.Value = 0;

    DoRequest();
}

/// <summary>
/// Create the screen shot request
/// </summary>
void DoRequest()
{
    try
    {
        progressBar1.Invoke(new MethodInvoker(delegate ()
        {
            if (progressBar1.Value < progressBar1.Maximum)
            {
                progressBar1.PerformStep();
                
                Size? resize = null;
                _captureProcess.CaptureInterface.BeginGetScreenshot(new Rectangle(0, 0, 0, 0), new TimeSpan(0, 0, 2), Callback, resize, (ImageFormat)Enum.Parse(typeof(ImageFormat), "Bitmap"));
            }            
        })
        );
    }
    catch
    {

    }
}

/// <summary>
/// The callback for when the screenshot has been taken
/// </summary>
/// <param name="clientPID"></param>
/// <param name="status"></param>
/// <param name="screenshotResponse"></param>
void Callback(IAsyncResult result)
{
    Screenshot screenshot;
    try
    {
        screenshot = _captureProcess.CaptureInterface.EndGetScreenshot(result);
    }
    catch
    {
        screenshot = null;
    }

    if (screenshot != null)
    {
        using (screenshot)
            try
            {
                _captureProcess.CaptureInterface.DisplayInGameText("Screenshot captured...");
                if (screenshot != null && screenshot.Data != null)
                {
                    bmp = new Bitmap(screenshot.ToBitmap());
                }

                Thread t = new Thread(new ThreadStart(DoRequest));
                t.Start();
            }
            catch
            {
            }
        while (!result.IsCompleted)
        {
            Thread.Sleep(200);
        }
    }
}

Size? resize = null;
if (!string.IsNullOrEmpty(txtResizeHeight.Text) && !String.IsNullOrEmpty(txtResizeWidth.Text))
        resize = new System.Drawing.Size(int.Parse(txtResizeWidth.Text), int.Parse(txtResizeHeight.Text));
var res = _captureProcess.CaptureInterface.GetScreenshot(new Rectangle(int.Parse(txtCaptureX.Text), int.Parse(txtCaptureY.Text), int.Parse(txtCaptureWidth.Text), int.Parse(txtCaptureHeight.Text)),
                                                                       new TimeSpan(0, 0, 2),
                                                                       resize,
                                                                       (ImageFormat)Enum.Parse(typeof(ImageFormat), cmbFormat.Text)
                                                                       );
pictureBox1.Image = res.ToBitmap();