private void button1_Click(object sender, EventArgs e)
{
//Create word document
Document document = new Document();
Section section = document.AddSection();
//page setup
SetPage(section);
//insert header and footer
InsertHeaderAndFooter(section);
//add content
InsertContent(section);
//encrypt document with password specified by textBox1
document.Encrypt(this.textBox1.Text);
//Save doc file.
document.SaveToFile("Sample.doc",FileFormat.Doc);
//Launching the MS Word file.
WordDocViewer("Sample.doc");
}