SystemEvents::UserPreferenceChanging Event
Occurs when a user preference is changing.
Assembly: System (in System.dll)
| Exception | Condition |
|---|---|
| InvalidOperationException | System event notifications are not supported under the current context. Server processes, for example, might not support global system event notifications. |
| ExternalException | The attempt to create a system events window thread did not succeed. |
Note |
|---|
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. |
Caution |
|---|
Because this is a static event, you must detach your event handlers when your application is disposed, or memory leaks will result. |
The following code example demonstrates how to monitor the UserPreferenceChanging event. This code example is part of a larger example provided for the SystemEvents class.
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(); }
Available since 1.1

