WindowSizeChangedEventArgs WindowSizeChangedEventArgs WindowSizeChangedEventArgs WindowSizeChangedEventArgs Class


Contains the argument returned by a window size change event.

public : sealed class WindowSizeChangedEventArgs : ICoreWindowEventArgs, IWindowSizeChangedEventArgs
struct winrt::Windows::UI::Core::WindowSizeChangedEventArgs : ICoreWindowEventArgs, IWindowSizeChangedEventArgs
public sealed class WindowSizeChangedEventArgs : ICoreWindowEventArgs, IWindowSizeChangedEventArgs
Public NotInheritable Class WindowSizeChangedEventArgs Implements ICoreWindowEventArgs, IWindowSizeChangedEventArgs
Windows 10 requirements
Device family
Windows 10 (introduced v10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (introduced v1)


This object is returned by a delegate registered for the CoreWindow.SizeChanged event.

// returning window size change events data through WindowSizeChangedEventArgs

void MyCoreWindowEvents::SetWindow( // implementation called by CoreApplication::Run(), provided for context
    _In_ CoreWindow^ window

    // ...
    window->SizeChanged +=
        ref new TypedEventHandler<CoreWindow^, WindowSizeChangedEventArgs^>(this, &CoreWindowEvents::OnWindowSizeChanged)

    // ...



: This class is not agile, which means that you need to consider its threading model and marshaling behavior. For more info, see Threading and Marshaling (C++/CX).


Handled Handled Handled Handled

Gets or sets whether the window size event was handled.

public : Platform::Boolean Handled { get; set; }
bool Handled(); void Handled(bool handled);
public bool Handled { get; set; }
Public ReadWrite Property Handled As bool
bool bool

True if the window size event has been handled by the appropriate delegate; false if it has not.

Size Size Size Size

Gets the new size of the window in units of effective (view) pixels.

public : Size Size { get; }
Size Size();
public Size Size { get; }
Public ReadOnly Property Size As Size
Size Size

The new size of the window.