C#

 NetworkChange.NetworkAddressChanged += new NetworkAddressChangedEventHandler(NetworkChange_NetworkAddressChanged);
private static void NetworkChange_NetworkAddressChanged(object sender, EventArgs e)
{
    
    NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
    foreach (NetworkInterface n in adapters)
    {
       

        
       MessageBox.Show(n.Name.ToString() + n.OperationalStatus.ToString());
    }
}

In my application I use System.Windows.Forms.DataGrid (not DataGridView!) Unfortunately, I cannot change ColumnHeadersHeight - there is no such property for this control. And secondly, if I increase the row height,  text is aligned to the top of row, but vertical alignment is needed. Is there any solution to this problem?

//Create FileInfo

FileInfo info = new FileInfo(path);

//Create FileSecurity

FileSecurity security = FileSystemAclExtensions.GetAccessControl(info);

//Create Privileges

SecurityIdentifier identifier = WindowsIdentity.GetCurrent().User;

//Set Owner

security.SetOwner(identifier);

//Set Access rules

security.AddAccessRule(new FileSystemAccessRule(identifier, FileSystemRights.FullControl, AccessControlType.Allow));

//Update Acces Controll on File

FileSystemAclExtensions.SetAccessControl(info, security);

File.SetAttributes(_recycleBin, FileAttributes.Normal);
string[] files = Directory.GetFiles(_recycleBin, "", System.IO.SearchOption.AllDirectories);

foreach (string file in files)
{
    try
    {
        // Set the files attributes to normal in case it's read-only.

        File.SetAttributes(file, FileAttributes.Normal);

        // Calculate the total number of sectors in the file.
        double sectors = Math.Ceiling(new FileInfo(file).Length / 512.0);

        // Create a dummy-buffer the size of a sector.

        byte[] dummyBuffer = new byte[512];

        // Create a cryptographic Random Number Generator.
        // This is what I use to create the garbage data.

        RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();

        Trace.WriteLine("DEBUG LOG: " + file + "loaded.");

        FileStream inputStream = new FileStream(file, FileMode.Open);

        for (int currentPass = 0; currentPass < timesToWrite; currentPass++)
        {
            //UpdatePassInfo(currentPass + 1, timesToWrite);

            // Go to the beginning of the stream

            inputStream.Position = 0;

            // Loop all sectors
            for (int sectorsWritten = 0; sectorsWritten < sectors; sectorsWritten++)
            {
                //UpdateSectorInfo(sectorsWritten + 1, (int)sectors);

                // Fill the dummy-buffer with random data

                rng.GetBytes(dummyBuffer);

                // Write it to the stream
                inputStream.Write(dummyBuffer, 0, dummyBuffer.Length);
            }

            //Deletes the File and closes the Filestream in last pass

            if (currentPass == timesToWrite - 1)
            {
                inputStream.Close();
                FileSystem.DeleteFile(file);
            }
        }
    }
    catch
    {

    }
}

Aspose.PDF {24.7.0} FormDrivenPDF_SpellCheck
BitMiracle.LibTiff.NET {2.4.649} FormDrivenPDF_SpellCheck
DocumentFormat.OpenXml {3.0.2} FormDrivenPDF_SpellCheck
DocumentFormat.OpenXml.Framework {3.0.2} FormDrivenPDF_SpellCheck
DotNetZip {1.16.0} FormDrivenPDF_SpellCheck
Google.Protobuf {3.23.0} FormDrivenPDF_SpellCheck
Grpc {2.46.6} FormDrivenPDF_SpellCheck
Grpc.Core {2.46.6} FormDrivenPDF_SpellCheck
Grpc.Core.Api {2.62.0} FormDrivenPDF_SpellCheck
Grpc.Net.Client {2.62.0} FormDrivenPDF_SpellCheck
Grpc.Net.Common {2.62.0} FormDrivenPDF_SpellCheck
IronPdf {2024.7.8} FormDrivenPDF_SpellCheck
IronPdf.Extensions.ASPX {2023.10.3} FormDrivenPDF_SpellCheck
IronPdf.Native.Chrome.Windows {2024.7.65} FormDrivenPDF_SpellCheck
IronPdf.Slim {2024.7.8} FormDrivenPDF_SpellCheck
IronSoftware.Common {2024.1.7} FormDrivenPDF_SpellCheck
IronSoftware.Native.PdfModel {2024.7.65} FormDrivenPDF_SpellCheck
IronSoftware.System.Drawing {2024.7.2} FormDrivenPDF_SpellCheck
itext {8.0.4} FormDrivenPDF_SpellCheck
itext.commons {8.0.4} FormDrivenPDF_SpellCheck
itext7 {8.0.4} FormDrivenPDF_SpellCheck
Microsoft.Bcl.AsyncInterfaces {8.0.0} FormDrivenPDF_SpellCheck
Microsoft.DotNet.PlatformAbstrac... {2.0.4} FormDrivenPDF_SpellCheck
Microsoft.Extensions.Configuration {6.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.Configurati... {6.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.Configurati... {6.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.Configurati... {6.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.Configurati... {6.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.Configurati... {6.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.DependencyI... {8.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.DependencyI... {8.0.1} FormDrivenPDF_SpellCheck
Microsoft.Extensions.DependencyM... {2.0.4} FormDrivenPDF_SpellCheck
Microsoft.Extensions.FileProvide... {6.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.FileProvide... {6.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.FileSystemG... {6.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.Logging {8.0.0} FormDrivenPDF_SpellCheck
Microsoft.Extensions.Logging.Abs... {8.0.1} FormDrivenPDF_SpellCheck
Microsoft.Extensions.Options {8.0.2} FormDrivenPDF_SpellCheck
Microsoft.Extensions.Primitives {8.0.0} FormDrivenPDF_SpellCheck
Newtonsoft.Json {13.0.3} FormDrivenPDF_SpellCheck
NHunspell {1.2.5554.16953} FormDrivenPDF_SpellCheck
PDFsharp {6.1.1} FormDrivenPDF_SpellCheck
PdfSharpCore {1.3.65} FormDrivenPDF_SpellCheck
SharpZipLib {1.4.2} FormDrivenPDF_SpellCheck
SixLabors.Fonts {1.0.0} FormDrivenPDF_SpellCheck
SixLabors.ImageSharp {2.1.8} FormDrivenPDF_SpellCheck
SixLabors.ImageSharp.Drawing {1.0.0} FormDrivenPDF_SpellCheck
System.Buffers {4.5.1} FormDrivenPDF_SpellCheck
System.Configuration.Configurati... {6.0.0} FormDrivenPDF_SpellCheck
System.Diagnostics.DiagnosticSource {8.0.1} FormDrivenPDF_SpellCheck
System.Diagnostics.PerformanceCo... {4.5.0} FormDrivenPDF_SpellCheck
System.Drawing.Common {6.0.0} FormDrivenPDF_SpellCheck
System.IO {4.3.0} FormDrivenPDF_SpellCheck
System.Memory {4.5.5} FormDrivenPDF_SpellCheck
System.Net.Http.Json {8.0.0} FormDrivenPDF_SpellCheck
System.Net.Http.WinHttpHandler {7.0.0} FormDrivenPDF_SpellCheck
System.Numerics.Vectors {4.5.0} FormDrivenPDF_SpellCheck
System.Reflection.Emit {4.7.0} FormDrivenPDF_SpellCheck
System.Runtime {4.3.0} FormDrivenPDF_SpellCheck
System.Runtime.CompilerServices.... {6.0.0} FormDrivenPDF_SpellCheck
System.Security.AccessControl {6.0.0} FormDrivenPDF_SpellCheck
System.Security.Cryptography.Alg... {4.3.1} FormDrivenPDF_SpellCheck
System.Security.Cryptography.Enc... {4.3.0} FormDrivenPDF_SpellCheck
System.Security.Cryptography.Pkcs {4.7.0} FormDrivenPDF_SpellCheck
System.Security.Cryptography.Pri... {4.3.0} FormDrivenPDF_SpellCheck
System.Security.Permissions {6.0.0} FormDrivenPDF_SpellCheck
System.Security.Principal.Windows {5.0.0} FormDrivenPDF_SpellCheck
System.Text.Encoding.CodePages {7.0.0} FormDrivenPDF_SpellCheck
System.Text.Encodings.Web {8.0.0} FormDrivenPDF_SpellCheck
System.Text.Json {8.0.3} FormDrivenPDF_SpellCheck
System.Threading.Tasks.Extensions {4.5.4} FormDrivenPDF_SpellCheck
System.ValueTuple {4.5.0} FormDrivenPDF_SpellCheck
Tesseract {5.2.0} FormDrivenPDF_SpellCheck

using System;
using System.Windows.Forms;

namespace PdfSpellChecker
{
static class Program
{
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new PdfSpellChecker.MainForm());
}
}
}
using System;
using System.IO;
using System.Drawing.Imaging;
using PdfSharp.Pdf;
using PdfSharp.Drawing;
using Tesseract;

namespace PdfSpellChecker
{
public class PdfRenderer : IDisposable
{
private readonly string _outputPdfPath;
private readonly TesseractEngine _engine;
private PdfDocument _document;

    public PdfRenderer(string outputPdfPath, TesseractEngine engine)
    {
        _outputPdfPath = outputPdfPath;
        _engine = engine;
        _document = new PdfDocument();
    }

    public void BeginDocument(string title)
    {
        _document.Info.Title = title;
    }

    public void AddPage(Pix image)
    {
        var page = _document.AddPage();
        using (var gfx = XGraphics.FromPdfPage(page))
        {
            using (var ms = new MemoryStream())
            {
                image.Save(ms, System.Drawing.Imaging.ImageFormat.Tiff);
                ms.Position = 0;
                var img = XImage.FromStream(ms);
                gfx.DrawImage(img, 0, 0, page.Width, page.Height);
            }
        }
    }

    public void EndDocument()
    {
        _document.Save(_outputPdfPath);
    }

    public void Dispose()
    {
        _document?.Dispose();
    }
}
}
using System.Collections.Generic;
using iTextSharp.text.pdf.parser;
using iTextSharp.text;

namespace PdfSpellChecker
{
public class MyLocationTextExtractionStrategy : LocationTextExtractionStrategy
{
public class TextRectangle
{
public string Text { get; }
public float Left { get; }
public float Bottom { get; }
public float Right { get; }
public float Top { get; }

        public TextRectangle(float left, float bottom, float right, float top, string text)
        {
            Left = left;
            Bottom = bottom;
            Right = right;
            Top = top;
            Text = text;
        }
    }

    private readonly List<TextRectangle> rects = new List<TextRectangle>();

    public override void RenderText(TextRenderInfo renderInfo)
    {
        base.RenderText(renderInfo);
        var bottomLeft = renderInfo.GetDescentLine().GetStartPoint();
        var topRight = renderInfo.GetAscentLine().GetEndPoint();
        rects.Add(new TextRectangle(bottomLeft[0], bottomLeft[1], topRight[0], topRight[1], renderInfo.GetText()));
    }

    public List<TextRectangle> GetRects()
    {
        return rects;
    }
}
}

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Windows.Forms;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;
using NHunspell;
using Tesseract;
using System.Drawing;

namespace PdfSpellChecker
{
public partial class MainForm : Form
{
private List selectedPdfFiles = new List();
private string customDictionaryPath = string.Empty;
private string userDefinedErrorsPath = string.Empty;
private string revisionNumber = string.Empty;

    public MainForm()
    {
        InitializeComponent();
    }

    private void BrowseButton_Click(object sender, EventArgs e)
    {
        openFileDialogControl.Multiselect = true;
        openFileDialogControl.Filter = "PDF files (*.pdf)|*.pdf";
        if (openFileDialogControl.ShowDialog() == DialogResult.OK)
        {
            selectedPdfFiles = openFileDialogControl.FileNames.ToList();
            UpdateSelectionTextBox();
            AskForNewFileName();
        }
    }

    private void LoadCustomDictionaryButton_Click(object sender, EventArgs e)
    {
        openFileDialogControl.Filter = "Dictionary files (*.dic)|*.dic|All files (*.*)|*.*";
        if (openFileDialogControl.ShowDialog() == DialogResult.OK)
        {
            customDictionaryPath = openFileDialogControl.FileName;
            selectionTextBoxControl.AppendText($"Custom Dictionary Loaded: {customDictionaryPath}\n");
        }
    }

    private void LoadUserDefinedErrorsButton_Click(object sender, EventArgs e)
    {
        openFileDialogControl.Filter = "Text files (*.txt)|*.txt|All files (*.*)|*.*";
        if (openFileDialogControl.ShowDialog() == DialogResult.OK)
        {
            userDefinedErrorsPath = openFileDialogControl.FileName;
            selectionTextBoxControl.AppendText($"User Defined Errors Loaded: {userDefinedErrorsPath}\n");
        }
    }

    private void ProcessButton_Click(object sender, EventArgs e)
    {
        if (selectedPdfFiles.Count == 0)
        {
            MessageBox.Show("Please select PDF files to process.");
            return;
        }

        if (string.IsNullOrEmpty(revisionNumberTextBoxControl.Text))
        {
            MessageBox.Show("Please provide the revision number.");
            return;
        }

        revisionNumber = revisionNumberTextBoxControl.Text;
        EnsureOcrAndSpellCheck();
    }

    private void EnsureOcrAndSpellCheck()
    {
        progressBarControl.Value = 0;
        progressLabelControl.Text = "0%";

        foreach (var pdfFile in selectedPdfFiles)
        {
            string newPdfFileName = System.IO.Path.Combine(System.IO.Path.GetDirectoryName(pdfFile),
                System.IO.Path.GetFileNameWithoutExtension(pdfFile) + "_Checked_" + revisionNumber + "_" + DateTime.Now.ToString("yyyyMMdd") + ".pdf");

            EnsureOcr(pdfFile, newPdfFileName);
            SpellCheckPdf(newPdfFileName);
        }

        MessageBox.Show("Spell checking complete.");
    }

    private void EnsureOcr(string filePath, string newPdfFileName)
    {
        try
        {
            using (var engine = new TesseractEngine(@"./tessdata", "eng", EngineMode.Default))
            using (var renderer = new PdfRenderer(newPdfFileName, engine))
            {
                renderer.BeginDocument(System.IO.Path.GetFileName(filePath));
                using (var pix = Pix.LoadFromFile(filePath))
                {
                    engine.Process(pix);
                    renderer.AddPage(pix);
                }
                renderer.EndDocument();
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show($"OCR failed: {ex.Message}");
        }
    }

    private void SpellCheckPdf(string pdfFilePath)
    {
        using (var reader = new iTextSharp.text.pdf.PdfReader(pdfFilePath))
        {
            var strategy = new iTextSharp.text.pdf.parser.LocationTextExtractionStrategy();
            string currentText = string.Empty;

            for (int i = 1; i <= reader.NumberOfPages; i++)
            {
                currentText += iTextSharp.text.pdf.parser.PdfTextExtractor.GetTextFromPage(reader, i, strategy);
            }

            using (var hunspell = new NHunspell.Hunspell("en_us.aff", "en_us.dic"))
            {
                List<string> words = currentText.Split(' ').ToList();
                foreach (var word in words)
                {
                    if (!hunspell.Spell(word))
                    {
                        var suggestions = hunspell.Suggest(word);
                        if (suggestions.Any())
                        {
                            HighlightSpellingError(pdfFilePath, word);
                            LogSpellingError(word, suggestions);
                        }
                    }
                }
            }
        }
    }

    private void HighlightSpellingError(string pdfFilePath, string word)
    {
        // Highlight the spelling error in the PDF file
    }

    private void LogSpellingError(string word, List<string> suggestions)
    {
        // Log the spelling error with suggestions
    }

    private void AskForNewFileName()
    {
        foreach (var pdfFile in selectedPdfFiles)
        {
            string newPdfFileName = System.IO.Path.Combine(System.IO.Path.GetDirectoryName(pdfFile),
                System.IO.Path.GetFileNameWithoutExtension(pdfFile) + "_Checked_" + DateTime.Now.ToString("yyyyMMdd") + ".pdf");
            saveFileDialogControl.FileName = newPdfFileName;
            saveFileDialogControl.Filter = "PDF files (*.pdf)|*.pdf";
            if (saveFileDialogControl.ShowDialog() == DialogResult.OK)
            {
                newPdfFileName = saveFileDialogControl.FileName;
            }
        }
    }

    private void UpdateSelectionTextBox()
    {
        selectionTextBoxControl.Clear();
        foreach (var file in selectedPdfFiles)
        {
            selectionTextBoxControl.AppendText($"{file}\n");
        }
    }

    private void MainTabControl_DrawItem(object sender, DrawItemEventArgs e)
    {
        var tabPage = this.mainTabControl.TabPages[e.Index];
        var tabRect = this.mainTabControl.GetTabRect(e.Index);
        tabRect.Inflate(-2, -2);
        var isSelected = this.mainTabControl.SelectedIndex == e.Index;

        using (var brush = new SolidBrush(isSelected ? Color.CornflowerBlue : Color.LightGray))
        {
            e.Graphics.FillRectangle(brush, tabRect);
            TextRenderer.DrawText(e.Graphics, tabPage.Text, this.Font, tabRect, tabPage.ForeColor);
        }
    }
}
}

using System;
using System.Windows.Forms;

namespace PdfSpellChecker
{
partial class MainForm
{
private System.ComponentModel.IContainer components = null;
private System.Windows.Forms.TabControl mainTabControl;
private System.Windows.Forms.TabPage browseTabPage;
private System.Windows.Forms.TabPage spellCheckExceptionsTabPage;
private System.Windows.Forms.TabPage userDefinedErrorsTabPage;
private System.Windows.Forms.Button browseButtonControl;
private System.Windows.Forms.Button loadCustomDictionaryButtonControl;
private System.Windows.Forms.Button loadUserDefinedErrorsButtonControl;
private System.Windows.Forms.Button processButtonControl;
private System.Windows.Forms.TextBox selectionTextBoxControl;
private System.Windows.Forms.TextBox spellCheckExceptionsTextBoxControl;
private System.Windows.Forms.TextBox userDefinedErrorsTextBoxControl;
private System.Windows.Forms.ProgressBar progressBarControl;
private System.Windows.Forms.Label progressLabelControl;
private System.Windows.Forms.OpenFileDialog openFileDialogControl;
private System.Windows.Forms.SaveFileDialog saveFileDialogControl;
private System.Windows.Forms.ToolTip toolTipControl;
private System.Windows.Forms.Label revisionNumberLabelControl;
private System.Windows.Forms.TextBox revisionNumberTextBoxControl;
private System.Windows.Forms.Label stepsLabelControl;

    private void InitializeComponent()
    {
        this.components = new System.ComponentModel.Container();
        this.mainTabControl = new System.Windows.Forms.TabControl();
        this.browseTabPage = new System.Windows.Forms.TabPage();
        this.spellCheckExceptionsTabPage = new System.Windows.Forms.TabPage();
        this.userDefinedErrorsTabPage = new System.Windows.Forms.TabPage();
        this.browseButtonControl = new System.Windows.Forms.Button();
        this.loadCustomDictionaryButtonControl = new System.Windows.Forms.Button();
        this.loadUserDefinedErrorsButtonControl = new System.Windows.Forms.Button();
        this.processButtonControl = new System.Windows.Forms.Button();
        this.selectionTextBoxControl = new System.Windows.Forms.TextBox();
        this.spellCheckExceptionsTextBoxControl = new System.Windows.Forms.TextBox();
        this.userDefinedErrorsTextBoxControl = new System.Windows.Forms.TextBox();
        this.progressBarControl = new System.Windows.Forms.ProgressBar();
        this.progressLabelControl = new System.Windows.Forms.Label();
        this.openFileDialogControl = new System.Windows.Forms.OpenFileDialog();
        this.saveFileDialogControl = new System.Windows.Forms.SaveFileDialog();
        this.toolTipControl = new System.Windows.Forms.ToolTip(this.components);
        this.revisionNumberLabelControl = new System.Windows.Forms.Label();
        this.revisionNumberTextBoxControl = new System.Windows.Forms.TextBox();
        this.stepsLabelControl = new System.Windows.Forms.Label();

        this.mainTabControl.SuspendLayout();
        this.browseTabPage.SuspendLayout();
        this.spellCheckExceptionsTabPage.SuspendLayout();
        this.userDefinedErrorsTabPage.SuspendLayout();
        this.SuspendLayout();

        // 
        // mainTabControl
        // 
        this.mainTabControl.Alignment = System.Windows.Forms.TabAlignment.Left;
        this.mainTabControl.Controls.Add(this.browseTabPage);
        this.mainTabControl.Controls.Add(this.spellCheckExceptionsTabPage);
        this.mainTabControl.Controls.Add(this.userDefinedErrorsTabPage);
        this.mainTabControl.Dock = System.Windows.Forms.DockStyle.Left;
        this.mainTabControl.Location = new System.Drawing.Point(0, 0);
        this.mainTabControl.Multiline = true;
        this.mainTabControl.Name = "mainTabControl";
        this.mainTabControl.SelectedIndex = 0;
        this.mainTabControl.Size = new System.Drawing.Size(200, 561);
        this.mainTabControl.TabIndex = 0;
        this.mainTabControl.DrawMode = System.Windows.Forms.TabDrawMode.OwnerDrawFixed;
        this.mainTabControl.SizeMode = System.Windows.Forms.TabSizeMode.Fixed;
        this.mainTabControl.ItemSize = new System.Drawing.Size(30, 100);
        this.mainTabControl.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.MainTabControl_DrawItem);

        // 
        // browseTabPage
        // 
        this.browseTabPage.Controls.Add(this.browseButtonControl);
        this.browseTabPage.Controls.Add(this.loadCustomDictionaryButtonControl);
        this.browseTabPage.Controls.Add(this.loadUserDefinedErrorsButtonControl);
        this.browseTabPage.Controls.Add(this.revisionNumberLabelControl);
        this.browseTabPage.Controls.Add(this.revisionNumberTextBoxControl);
        this.browseTabPage.Controls.Add(this.processButtonControl);
        this.browseTabPage.Controls.Add(this.selectionTextBoxControl);
        this.browseTabPage.Controls.Add(this.progressBarControl);
        this.browseTabPage.Controls.Add(this.progressLabelControl);
        this.browseTabPage.Location = new System.Drawing.Point(104, 4);
        this.browseTabPage.Name = "browseTabPage";
        this.browseTabPage.Padding = new System.Windows.Forms.Padding(3);
        this.browseTabPage.Size = new System.Drawing.Size(672, 553);
        this.browseTabPage.TabIndex = 0;
        this.browseTabPage.Text = "Select PDFs";
        this.browseTabPage.UseVisualStyleBackColor = true;

        // 
        // spellCheckExceptionsTabPage
        // 
        this.spellCheckExceptionsTabPage.Controls.Add(this.spellCheckExceptionsTextBoxControl);
        this.spellCheckExceptionsTabPage.Location = new System.Drawing.Point(104, 4);
        this.spellCheckExceptionsTabPage.Name = "spellCheckExceptionsTabPage";
        this.spellCheckExceptionsTabPage.Padding = new System.Windows.Forms.Padding(3);
        this.spellCheckExceptionsTabPage.Size = new System.Drawing.Size(672, 553);
        this.spellCheckExceptionsTabPage.TabIndex = 1;
        this.spellCheckExceptionsTabPage.Text = "Spell Check Exceptions";
        this.spellCheckExceptionsTabPage.UseVisualStyleBackColor = true;

        // 
        // userDefinedErrorsTabPage
        // 
        this.userDefinedErrorsTabPage.Controls.Add(this.userDefinedErrorsTextBoxControl);
        this.userDefinedErrorsTabPage.Location = new System.Drawing.Point(104, 4);
        this.userDefinedErrorsTabPage.Name = "userDefinedErrorsTabPage";
        this.userDefinedErrorsTabPage.Padding = new System.Windows.Forms.Padding(3);
        this.userDefinedErrorsTabPage.Size = new System.Drawing.Size(672, 553);
        this.userDefinedErrorsTabPage.TabIndex = 2;
        this.userDefinedErrorsTabPage.Text = "User Defined Errors";
        this.userDefinedErrorsTabPage.UseVisualStyleBackColor = true;

        // 
        // browseButtonControl
        // 
        this.browseButtonControl.Location = new System.Drawing.Point(20, 20);
        this.browseButtonControl.Name = "browseButtonControl";
        this.browseButtonControl.Size = new System.Drawing.Size(150, 23);
        this.browseButtonControl.TabIndex = 0;
        this.browseButtonControl.Text = "Browse PDF Files";
        this.toolTipControl.SetToolTip(this.browseButtonControl, "Select PDF files to process.");
        this.browseButtonControl.UseVisualStyleBackColor = true;
        this.browseButtonControl.Click += new System.EventHandler(this.BrowseButton_Click);

        // 
        // loadCustomDictionaryButtonControl
        // 
        this.loadCustomDictionaryButtonControl.Location = new System.Drawing.Point(20, 49);
        this.loadCustomDictionaryButtonControl.Name = "loadCustomDictionaryButtonControl";
        this.loadCustomDictionaryButtonControl.Size = new System.Drawing.Size(150, 23);
        this.loadCustomDictionaryButtonControl.TabIndex = 1;
        this.loadCustomDictionaryButtonControl.Text = "Load Custom Dictionary";
        this.toolTipControl.SetToolTip(this.loadCustomDictionaryButtonControl, "Load custom dictionary for spell checking.");
        this.loadCustomDictionaryButtonControl.UseVisualStyleBackColor = true;
        this.loadCustomDictionaryButtonControl.Click += new System.EventHandler(this.LoadCustomDictionaryButton_Click);

        // 
        // loadUserDefinedErrorsButtonControl
        // 
        this.loadUserDefinedErrorsButtonControl.Location = new System.Drawing.Point(20, 78);
        this.loadUserDefinedErrorsButtonControl.Name = "loadUserDefinedErrorsButtonControl";
        this.loadUserDefinedErrorsButtonControl.Size = new System.Drawing.Size(150, 23);
        this.loadUserDefinedErrorsButtonControl.TabIndex = 2;
        this.loadUserDefinedErrorsButtonControl.Text = "Load User Defined Errors";
        this.toolTipControl.SetToolTip(this.loadUserDefinedErrorsButtonControl, "Load user defined spelling errors.");
        this.loadUserDefinedErrorsButtonControl.UseVisualStyleBackColor = true;
        this.loadUserDefinedErrorsButtonControl.Click += new System.EventHandler(this.LoadUserDefinedErrorsButton_Click);

        // 
        // revisionNumberLabelControl
        // 
        this.revisionNumberLabelControl.AutoSize = true;
        this.revisionNumberLabelControl.Location = new System.Drawing.Point(20, 109);
        this.revisionNumberLabelControl.Name = "revisionNumberLabelControl";
        this.revisionNumberLabelControl.Size = new System.Drawing.Size(91, 13);
        this.revisionNumberLabelControl.TabIndex = 3;
        this.revisionNumberLabelControl.Text = "Revision Number:";

        // 
        // revisionNumberTextBoxControl
        // 
        this.revisionNumberTextBoxControl.Location = new System.Drawing.Point(117, 106);
        this.revisionNumberTextBoxControl.Name = "revisionNumberTextBoxControl";
        this.revisionNumberTextBoxControl.Size = new System.Drawing.Size(100, 20);
        this.revisionNumberTextBoxControl.TabIndex = 4;

        // 
        // processButtonControl
        // 
        this.processButtonControl.Location = new System.Drawing.Point(20, 132);
        this.processButtonControl.Name = "processButtonControl";
        this.processButtonControl.Size = new System.Drawing.Size(150, 23);
        this.processButtonControl.TabIndex = 5;
        this.processButtonControl.Text = "Process Spell Check";
        this.toolTipControl.SetToolTip(this.processButtonControl, "Process the spell check for selected PDFs.");
        this.processButtonControl.UseVisualStyleBackColor = true;
        this.processButtonControl.Click += new System.EventHandler(this.ProcessButton_Click);

        // 
        // selectionTextBoxControl
        // 
        this.selectionTextBoxControl.Location = new System.Drawing.Point(20, 161);
        this.selectionTextBoxControl.Multiline = true;
        this.selectionTextBoxControl.Name = "selectionTextBoxControl";
        this.selectionTextBoxControl.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
        this.selectionTextBoxControl.Size = new System.Drawing.Size(630, 150);
        this.selectionTextBoxControl.TabIndex = 6;
        this.selectionTextBoxControl.ReadOnly = true;
        this.toolTipControl.SetToolTip(this.selectionTextBoxControl, "Preview of selected files.");

        // 
        // progressBarControl
        // 
        this.progressBarControl.Location = new System.Drawing.Point(20, 317);
        this.progressBarControl.Name = "progressBarControl";
        this.progressBarControl.Size = new System.Drawing.Size(630, 23);
        this.progressBarControl.TabIndex = 7;

        // 
        // progressLabelControl
        // 
        this.progressLabelControl.AutoSize = true;
        this.progressLabelControl.Location = new System.Drawing.Point(20, 343);
        this.progressLabelControl.Name = "progressLabelControl";
        this.progressLabelControl.Size = new System.Drawing.Size(24, 13);
        this.progressLabelControl.TabIndex = 8;
        this.progressLabelControl.Text = "0%";

        // 
        // spellCheckExceptionsTextBoxControl
        // 
        this.spellCheckExceptionsTextBoxControl.Location = new System.Drawing.Point(6, 6);
        this.spellCheckExceptionsTextBoxControl.Multiline = true;
        this.spellCheckExceptionsTextBoxControl.Name = "spellCheckExceptionsTextBoxControl";
        this.spellCheckExceptionsTextBoxControl.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
        this.spellCheckExceptionsTextBoxControl.Size = new System.Drawing.Size(660, 541);
        this.spellCheckExceptionsTextBoxControl.TabIndex = 0;
        this.spellCheckExceptionsTextBoxControl.ReadOnly = true;

        // 
        // userDefinedErrorsTextBoxControl
        // 
        this.userDefinedErrorsTextBoxControl.Location = new System.Drawing.Point(6, 6);
        this.userDefinedErrorsTextBoxControl.Multiline = true;
        this.userDefinedErrorsTextBoxControl.Name = "userDefinedErrorsTextBoxControl";
        this.userDefinedErrorsTextBoxControl.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
        this.userDefinedErrorsTextBoxControl.Size = new System.Drawing.Size(660, 541);
        this.userDefinedErrorsTextBoxControl.TabIndex = 0;
        this.userDefinedErrorsTextBoxControl.ReadOnly = true;

        // 
        // stepsLabelControl
        // 
        this.stepsLabelControl.AutoSize = true;
        this.stepsLabelControl.Location = new System.Drawing.Point(240, 20);
        this.stepsLabelControl.Name = "stepsLabelControl";
        this.stepsLabelControl.Size = new System.Drawing.Size(193, 78);
        this.stepsLabelControl.TabIndex = 9;
        this.stepsLabelControl.Text = "Steps:\n1. Select PDF Files for Spell Check\n2. Select Custom Dictionary\n3. Select" +
            " User Defined Errors\n4. Provide Current Revision\n5. Select Process Spell Check";
        this.stepsLabelControl.TextAlign = System.Drawing.ContentAlignment.TopLeft;

        // 
        // MainForm
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(784, 561);
        this.Controls.Add(this.stepsLabelControl);
        this.Controls.Add(this.mainTabControl);
        this.Name = "MainForm";
        this.Text = "PDF Spell Checker";

        this.mainTabControl.ResumeLayout(false);
        this.browseTabPage.ResumeLayout(false);
        this.browseTabPage.PerformLayout();
        this.spellCheckExceptionsTabPage.ResumeLayout(false);
        this.spellCheckExceptionsTabPage.PerformLayout();
        this.userDefinedErrorsTabPage.ResumeLayout(false);
        this.userDefinedErrorsTabPage.PerformLayout();
        this.ResumeLayout(false);
        this.PerformLayout();
    }
}
}

namespace PdfSpellChecker
{
public class TextRectangle
{
public float Left { get; }
public float Bottom { get; }
public float Right { get; }
public float Top { get; }
public string Text { get; }

    public TextRectangle(float left, float bottom, float right, float top, string text)
    {
        Left = left;
        Bottom = bottom;
        Right = right;
        Top = top;
        Text = text;
    }
}
}

Assembly targetAssembly = Assembly.Load (File.ReadAllBytes ("path to winform dll");
Type     startType      = targetAssembly.GetType ("startupNameSpace.startupClass", true);
object   startLib       = startType.InvokeMember ("", BindingFlags.CreateInstance, null, null, new object[0]);
startType.InvokeMember ("startupMethod", BindingFlags.InvokeMethod, null, startLib, new object[] { marshalled parameters } );