SystemEvents.UserPreferenceChanged SystemEvents.UserPreferenceChanged SystemEvents.UserPreferenceChanged SystemEvents.UserPreferenceChanged Event

定义

命名空间:
Microsoft.Win32 Microsoft.Win32 Microsoft.Win32 Microsoft.Win32
Assemblies:
System.dll, Microsoft.Win32.SystemEvents.dll

在用户首选项更改后发生。Occurs when a user preference has changed.

public:
 static event Microsoft::Win32::UserPreferenceChangedEventHandler ^ UserPreferenceChanged;
public static event Microsoft.Win32.UserPreferenceChangedEventHandler UserPreferenceChanged;
member this.UserPreferenceChanged : Microsoft.Win32.UserPreferenceChangedEventHandler 
Public Shared Custom Event UserPreferenceChanged As UserPreferenceChangedEventHandler

异常

InvalidOperationException InvalidOperationException InvalidOperationException InvalidOperationException

当前上下文不支持系统事件通知。System event notifications are not supported under the current context. 例如，服务器进程可能不支持全局系统事件通知。Server processes, for example, might not support global system event notifications.

ExternalException ExternalException ExternalException ExternalException

创建系统事件窗口线程的尝试未成功。The attempt to create a system events window thread did not succeed.

注解

备注

仅当消息泵正在运行时才引发此事件。This event is only raised if the message pump is running. 在 Windows 服务中, 除非使用隐藏的窗体或手动启动了消息泵, 否则将不会引发此事件。In a Windows service, unless a hidden form is used or the message pump has been started manually, this event will not be raised. 有关演示如何使用 Windows 服务中的隐藏窗体处理系统事件的代码示例, 请参阅SystemEvents类。For a code example that shows how to handle system events by using a hidden form in a Windows service, see the SystemEvents class.

注意

因为这是一个静态事件, 所以必须在释放应用程序时分离事件处理程序, 否则会导致内存泄漏。Because this is a static event, you must detach your event handlers when your application is disposed, or memory leaks will result.

适用于

另请参阅