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OSFeature.LayeredWindows Field

Represents the layered, top-level windows feature. This field is read-only.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public static readonly Object LayeredWindows

A layered window can be made transparent or translucent by the operating system. Support for layered windows was first introduced in Windows 2000. For more information, see the "Layered Windows: A New Way to Use Translucency and Transparency Effects in Windows Applications" in the Platform SDK documentation at http://msdn.microsoft.com.

To determine if the layered windows feature is installed, use the Feature property to call the base class method IsPresent with LayeredWindows as the feature to look for.

Alternatively, you can check to see if the feature is installed by calling the GetVersionPresent method with LayeredWindows as the feature to find.

Windows 2000, Windows 2000 Professional, Windows 2000 Server, Windows 2000 Advanced Server, Windows XP Home Edition, Windows XP Professional x64 Edition, Windows Server 2003 Platform Note: Supports the Layered Windows API. Note however, that some display drivers do not support layering.

The following example determines whether the current system supports layered windows. The base class method IsPresent is called with LayeredWindows as the feature to look for. The result is displayed in a text box. This code assumes textBox1 has been instantiated and placed on a form.

private void LayeredWindows() {
   // Gets the version of the layered windows feature.
   Version myVersion =
       OSFeature.Feature.GetVersionPresent(OSFeature.LayeredWindows);

   // Prints whether the feature is available. 
   if (OSFeature.Feature.IsPresent(OSFeature.LayeredWindows))
      textBox1.Text = "Layered windows feature is installed.";
   else
      textBox1.Text = "Layered windows feature is not installed.";
}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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