// When the Preferences dialog is shown
public override void OnShowPreferences(PreferencesController controller)
{
base.OnShowPreferences(controller);
// Load preferences
preferencesform = new PreferencesForm();
preferencesform.Setup(controller);
}
// When the Preferences dialog is closed
public override void OnClosePreferences(PreferencesController controller)
{
base.OnClosePreferences(controller);
// Apply settings that could have been changed
LoadSettings();
// Unload preferences
preferencesform.Dispose();
preferencesform = null;
}