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29.20 How can I tell if the user has changed some system preference such as the locale or display settings?
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Use the static events in the SystemEvents class found in the Microsoft.Win32 namespace. There are many events in this class. Here are a couple:
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SystemEvents.DisplaySettingsChanged += new System.EventHandler(displaySettingsChanged);
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SystemEvents.UserPreferenceChanged +=
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new UserPreferenceChangedEventHandler(userPreferencesChanged);
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private void displaySettingsChanged(object sender, EventArgs e)
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MessageBox.Show(e.ToString());
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private void userPreferencesChanged(object sender, UserPreferenceChangedEventArgs e)
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case UserPreferenceCategory.Locale:
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MessageBox.Show("Changed locale");
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MessageBox.Show(e.Category.ToString());
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