srajeshreddy said:

Hello

I need to enable the "The spelling check is complete" message box.

If user enter text with correct spell it is not giving any message.

I am using the following on button click.

ultraSpellCheckerForComments.ShowSpellCheckDialog(this.textComments);

Another way to do what you're asking is to use the SpellCheckDialogClosed event, and check if the Dialog result was OK (meaning not cancelled by the user). Code snippet showing the event is below:

private void ultraSpellChecker1_SpellCheckDialogClosed(object sender, Infragistics.Win.UltraWinSpellChecker.SpellCheckDialogClosedEventArgs e)
{
    if (e.DialogResult == System.Windows.Forms.DialogResult.OK)
    {
        MessageBox.Show("The spell checking is complete.",
            "Spell Checker",
            MessageBoxButtons.OK,
            MessageBoxIcon.Information);
    }
}