Gets the instantiated windows in an application.
Assembly: PresentationFramework (in PresentationFramework.dll)
A Window reference is automatically added to as soon as a window is instantiated on the user interface (UI) thread; windows that are created by worker threads are not added. A Window reference is automatically removed after its Closing event has been handled and before its Closed event is raised.
By default, the first item added to the property becomes the MainWindow.
This property is available only from the thread that created the Application object.
The following example demonstrates how to enumerate the property to build a top-level Windows menu, which is common to multiple-document interface (MDI) applications like Microsoft Excel, or multiple-instance Single Document Interface (SDI) applications like Microsoft Word.
<Window x:Class="CSharp.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="CSharp" Height="300" Width="300" Activated="MainWindow_Activated" > <StackPanel> <Menu> <MenuItem Header="_File"> <MenuItem Name="newWindowMenuItem" Click="newWindowMenuItem_Click" Header="_New Window"></MenuItem> <Separator></Separator> <MenuItem Name="exitMenuItem" Click="exitMenuItem_Click" Header="E_xit"></MenuItem> </MenuItem> <MenuItem Name="windowMenuItem" Header="_Window"> </MenuItem> </Menu> <Canvas></Canvas> </StackPanel> </Window>
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)