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HwndSourceParameters.UsesPerPixelOpacity Property

Gets a value that declares whether the per-pixel opacity of the source window content is respected.

Namespace:  System.Windows.Interop
Assembly:  PresentationCore (in PresentationCore.dll)
XMLNS for XAML: Not mapped to an xmlns.

public bool UsesPerPixelOpacity { get; set; }
<object UsesPerPixelOpacity="bool" .../>

Property Value

Type: System.Boolean
true if using per-pixel opacity; otherwise, false.

By enabling per-pixel opacity, the system no longer draws the non-client area.

The opacity is used when the window is drawn on the desktop (it represents a final rendering step and does not appear as a contributor to property values such as Opacity).

UsesPerPixelOpacity applies only to top-level windows.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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