SystemButtonEventController.SystemFunctionButtonPressed Event
Definition
Important
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Occurs when a Fn hardware system (also know as Function Shift) button is pressed.
// Register
event_token SystemFunctionButtonPressed(TypedEventHandler<SystemButtonEventController, SystemFunctionButtonEventArgs const&> const& handler) const;
// Revoke with event_token
void SystemFunctionButtonPressed(event_token const* cookie) const;
// Revoke with event_revoker
SystemButtonEventController::SystemFunctionButtonPressed_revoker SystemFunctionButtonPressed(auto_revoke_t, TypedEventHandler<SystemButtonEventController, SystemFunctionButtonEventArgs const&> const& handler) const;public event TypedEventHandler<SystemButtonEventController,SystemFunctionButtonEventArgs> SystemFunctionButtonPressed;function onSystemFunctionButtonPressed(eventArgs) { /* Your code */ }
systemButtonEventController.addEventListener("systemfunctionbuttonpressed", onSystemFunctionButtonPressed);
systemButtonEventController.removeEventListener("systemfunctionbuttonpressed", onSystemFunctionButtonPressed);
- or -
systemButtonEventController.onsystemfunctionbuttonpressed = onSystemFunctionButtonPressed;Public Custom Event SystemFunctionButtonPressed As TypedEventHandler(Of SystemButtonEventController, SystemFunctionButtonEventArgs) Event Type
Remarks
This API is intended for use by Accessibility tools as a low level hook for intercepting events from hardware system buttons.
SystemButtonEventController event registration applies system wide and is first-come, first-served. If an application or service sets a SystemButtonEventController event Handled property to true, applications or services that registered after that app or service for the same event notification will not receive the notification.