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Form.AllowTransparency Property

.NET Framework 4.5

Other Versions

This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.

Gets or sets a value indicating whether the opacity of the form can be adjusted.

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

Syntax

C++

[BrowsableAttribute(false)]
public bool AllowTransparency { get; set; }

Property Value

Type: System.Boolean
true if the opacity of the form can be changed; otherwise, false.

Remarks

This property is automatically set to true if the Opacity is changed. When the opacity of a form is set using the Opacity property, the form will layer objects on the form. If you set the AllowTransparency property to false the form will not be in layered mode which will improve the display performance of the form.

Version Information

.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

Platforms

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.

Reference

Form Class

System.Windows.Forms Namespace

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