 
        private void Form1_Load(object sender, EventArgs e)
        {
            RichTextBox1.ContextMenuStrip = ContextMenuStrip;
            RichTextBox1.Text = " ";
            fileName = "";
            modified = false;
            PasteToolStripMenuItem.Enabled = false;
            CopyToolStripMenuItem.Enabled = false;
            ClearToolStripMenuItem.Enabled = false;
            helpProvider1.HelpNamespace = "d:\\c#new\\8\\help.htm";
        }
