private void TutorialWindow_FormClosing(object sender, FormClosingEventArgs e)
{
directControl.Render = null;
device.ClearState();
}
/// <summary>
/// Handles the FormClosing event of the form.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.Forms.FormClosingEventArgs"/> instance containing the event data.</param>
private void TutorialWindow_FormClosing(object sender, FormClosingEventArgs e)
{
device.ClearState();
}