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SystemEvents.PaletteChanged Event

Definition

Occurs when the user switches to an application that uses a different palette.

C#
public static event EventHandler? PaletteChanged;
C#
public static event EventHandler PaletteChanged;

Event Type

Exceptions

System event notifications are not supported under the current context. Server processes, for example, might not support global system event notifications.

The attempt to create a system events window thread did not succeed.

Examples

The following code example demonstrates how to monitor the PaletteChanged event. This code example is part of a larger example provided for the SystemEvents class.

C#
static void Main() 
{         
    // Set the SystemEvents class to receive event notification when a user 
    // preference changes, the palette changes, or when display settings change.
    SystemEvents.UserPreferenceChanging += new 
        UserPreferenceChangingEventHandler(SystemEvents_UserPreferenceChanging);
    SystemEvents.PaletteChanged += new 
        EventHandler(SystemEvents_PaletteChanged);
    SystemEvents.DisplaySettingsChanged += new 
        EventHandler(SystemEvents_DisplaySettingsChanged);        

    // For demonstration purposes, this application sits idle waiting for events.
    Console.WriteLine("This application is waiting for system events.");
    Console.WriteLine("Press <Enter> to terminate this application.");
    Console.ReadLine();
}

Remarks

Σημείωση

This event is only raised if the message pump is running. In a Windows service, unless a hidden form is used or the message pump has been started manually, this event will not be raised. For a code example that shows how to handle system events by using a hidden form in a Windows service, see the SystemEvents class.

Προσοχή

Because this is a static event, you must detach your event handlers when your application is disposed, or memory leaks will result.

Applies to

Προϊόν Εκδόσεις
.NET 8 (package-provided), 9 (package-provided)
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7 (package-provided), 4.7, 4.7.1 (package-provided), 4.7.1, 4.7.2 (package-provided), 4.7.2, 4.8 (package-provided), 4.8, 4.8.1
.NET Standard 2.0 (package-provided)
Windows Desktop 3.0, 3.1, 5, 6, 7, 8, 9