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    copied!<p>WPF makes this absolutely trivial: It would proably take ten minutes or less. Here are the steps:</p> <ol> <li>Create a Window, set AllowsTransparency="true" and add a Grid to it</li> <li>Set the Grid's RenderTransform to a ScaleTransform with origin of 0,1</li> <li>Create an animation on the grid that animates the ScaleX 0 to 1 then later animates the Opacity from 1 to 0</li> <li>In the constructor calculate Window.Top and Window.Left to place the window in the lower right-hand corner of the screen.</li> </ol> <p>That's all there is to it.</p> <p>Using Expression Blend it took about 8 minutes me to generate the following working code:</p> <pre><code>&lt;Window x:Class="NotificationWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Notification Popup" Width="300" SizeToContent="Height" WindowStyle="None" AllowsTransparency="True" Background="Transparent"&gt; &lt;Grid RenderTransformOrigin="0,1" &gt; &lt;!-- Notification area --&gt; &lt;Border BorderThickness="1" Background="Beige" BorderBrush="Black" CornerRadius="10"&gt; &lt;StackPanel Margin="20"&gt; &lt;TextBlock TextWrapping="Wrap" Margin="5"&gt; &lt;Bold&gt;Notification data&lt;/Bold&gt;&lt;LineBreak /&gt;&lt;LineBreak /&gt; Something just happened and you are being notified of it. &lt;/TextBlock&gt; &lt;CheckBox Content="Checkable" Margin="5 5 0 5" /&gt; &lt;Button Content="Clickable" HorizontalAlignment="Center" /&gt; &lt;/StackPanel&gt; &lt;/Border&gt; &lt;!-- Animation --&gt; &lt;Grid.Triggers&gt; &lt;EventTrigger RoutedEvent="FrameworkElement.Loaded"&gt; &lt;BeginStoryboard&gt; &lt;Storyboard&gt; &lt;DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(ScaleTransform.ScaleY)"&gt; &lt;SplineDoubleKeyFrame KeyTime="0:0:0" Value="0"/&gt; &lt;SplineDoubleKeyFrame KeyTime="0:0:0.5" Value="1"/&gt; &lt;/DoubleAnimationUsingKeyFrames&gt; &lt;DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)"&gt; &lt;SplineDoubleKeyFrame KeyTime="0:0:2" Value="1"/&gt; &lt;SplineDoubleKeyFrame KeyTime="0:0:4" Value="0"/&gt; &lt;/DoubleAnimationUsingKeyFrames&gt; &lt;/Storyboard&gt; &lt;/BeginStoryboard&gt; &lt;/EventTrigger&gt; &lt;/Grid.Triggers&gt; &lt;Grid.RenderTransform&gt; &lt;ScaleTransform ScaleY="1" /&gt; &lt;/Grid.RenderTransform&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre> <p>With code behind:</p> <pre><code>using System; using System.Windows; using System.Windows.Threading; public partial class NotificationWindow { public NotificationWindow() { InitializeComponent(); Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, new Action(() =&gt; { var workingArea = System.Windows.Forms.Screen.PrimaryScreen.WorkingArea; var transform = PresentationSource.FromVisual(this).CompositionTarget.TransformFromDevice; var corner = transform.Transform(new Point(workingArea.Right, workingArea.Bottom)); this.Left = corner.X - this.ActualWidth - 100; this.Top = corner.Y - this.ActualHeight; })); } } </code></pre> <p>Since WPF is one of the regular .NET libraries, the answer is yes, it <em>is</em> possible to accomplish this with the "regular .NET libraries".</p> <p>If you're asking if there is a way to do this without using WPF the answer is still yes, but it is extremely complex and will take more like 5 days than 5 minutes.</p>
 

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