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AlphaImage class

Use the AlphaImage Web control to render PNG images in Microsoft Internet Explorer.

Namespace:  Microsoft.SharePoint.WebControls
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)

[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public class AlphaImage : SPControl

The AlphaImage Web control uses ECMAScript (JScript, JavaScript) to change the filter style for a PNG image. This allows Microsoft Internet Explorer to render transparency for the PNG image.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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