Gets or sets the width of all sidebars within the viewer (e.g. thumbnails, report parameters) as a CSS property value. If this value is a null reference (Nothing in Visual Basic), the viewer will use its default value.
Platforms: Windows 10 (Version 21H2 - 23H2), Windows 11 (21H2 - 22H2), Windows Server 2016 - 2022
.NET: .NET Framework 4.8, .NET 6, .NET 7, .NET 8