private void spellCheck(TextBox txt, Label lbl)
{
//Spell check
if (txt.Text.Length > 0)
{
//Create an instance of MS Word application
Word.Application app = new Word.Application();
app.Visible = false;
//Setup spell checker with text to check and count errors
//Setting these variables is comparable to passing null to the function
//This is necessary because the C# null cannot be passed by reference
object temp = Missing.Value, newTemp = Missing.Value, docType = Missing.Value, vis = true;
Word.Document doc = app.Documents.Add(ref temp, ref newTemp, ref docType, ref vis);
doc.Words.First.InsertBefore(txt.Text);
int errCount = doc.SpellingErrors.Count;
//Run the checker
object opt = Missing.Value;
doc.CheckSpelling(ref opt, ref opt, ref opt, ref opt, ref opt, ref opt, ref opt, ref opt, ref opt, ref opt, ref opt, ref opt);
//Update original text
object first = 0, last = doc.Characters.Count - 1;
txt.Text = doc.Range(ref first, ref last).Text;
txt.Text = txt.Text.Replace("\r", "\r\n");
lbl.Text = "Spelling OK. " + errCount + " error(s) corrected ";
//Close MS Word application
object save = false, format = Missing.Value, rtDoc = Missing.Value;
app.Quit(ref save, ref format, ref rtDoc);
}
}
