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UserPreferenceChangingEventArgs Class

 

Provides data for the UserPreferenceChanging event.

Namespace:   Microsoft.Win32
Assembly:  System (in System.dll)

System::Object
  System::EventArgs
    Microsoft.Win32::UserPreferenceChangingEventArgs

[HostProtectionAttribute(SecurityAction::LinkDemand, MayLeakOnAbort = true)]
[PermissionSetAttribute(SecurityAction::LinkDemand, Name = "FullTrust")]
[PermissionSetAttribute(SecurityAction::InheritanceDemand, Name = "FullTrust")]
public ref class UserPreferenceChangingEventArgs : EventArgs

NameDescription
System_CAPS_pubmethodUserPreferenceChangingEventArgs(UserPreferenceCategory)

Initializes a new instance of the UserPreferenceChangingEventArgs class using the specified user preference category identifier.

NameDescription
System_CAPS_pubpropertyCategory

Gets the category of user preferences that is changing.

NameDescription
System_CAPS_pubmethodEquals(Object^)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

A UserPreferenceChanging event occurs when a change to a user preference is about to be applied.

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

#using <System.dll>

using namespace System;
using namespace Microsoft::Win32;

// This method is called when a user preference changes.
void SystemEvents_UserPreferenceChanging(Object^ sender,
     UserPreferenceChangingEventArgs^ e)
 {
     Console::WriteLine("The user preference is changing. Category={0}",
         e->Category);
 }

// This method is called when the palette changes.
void SystemEvents_PaletteChanged(Object^ sender, EventArgs^ e)
{
    Console::WriteLine("The palette changed.");
}

// This method is called when the display settings change.
void SystemEvents_DisplaySettingsChanged(Object^ sender,
    EventArgs^ e)
{
    Console::WriteLine("The display settings changed.");
}

int main()
{
    // Set the SystemEvents class to receive event notification
    // when a user preference changes, the palette changes, or
    // when display settings change.
    SystemEvents::UserPreferenceChanging += gcnew
        UserPreferenceChangingEventHandler(
        SystemEvents_UserPreferenceChanging);
    SystemEvents::PaletteChanged += gcnew
        EventHandler(SystemEvents_PaletteChanged);
    SystemEvents::DisplaySettingsChanged += gcnew
        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();
}

// This code produces the following output.
//
//  This app is waiting for system events.
//  Press <Enter> to terminate this application.
//  Display Settings changed.
//  User preference is changing. Category=General

.NET Framework
Available since 1.1

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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