private void mnuTextBox_Opening(object sender, CancelEventArgs e)
{
txtEdit.Focus();
cutToolStripMenuItem.Enabled = copyToolStripMenuItem.Enabled =
openSelectionInBrowserToolStripMenuItem.Enabled =
(!string.IsNullOrEmpty(txtEdit.SelectedText));
undoToolStripMenuItem.Enabled = txtEdit.CanUndo;
openPageInBrowserToolStripMenuItem.Enabled = openHistoryMenuItem.Enabled =
openTalkPageInBrowserToolStripMenuItem.Enabled =
(TheArticle != null && !string.IsNullOrEmpty(TheArticle.Name));
replaceTextWithLastEditToolStripMenuItem.Enabled = (!string.IsNullOrEmpty(LastArticle));
}