FixedDocument logically binds an ordered sequence of pages together into a single, multi-page, fixed-layout document.

A FixedPage represents a page in FixedDocument. It provides content for the page within the FixedDocument. To support fixed content layout, FixedPageis inherited from Canvas. You can add controls with specific size and position inside a FixedPage.

<Intersoft:FixedPage Width="816" Height="1056">
    <TextBlock Text="Text" Canvas.Left="100" Canvas.Top="100"></TextBlock>
</Intersoft:FixedPage>

System.Object
   System.Windows.DependencyObject
      System.Windows.UIElement
         System.Windows.FrameworkElement
            System.Windows.Controls.Panel
               System.Windows.Controls.Canvas
                  Intersoft.Client.Documents.FixedPage
                     Intersoft.Client.Documents.SqlReportPage
                     Intersoft.Client.Documents.XPSFixedPage

Target Platforms: 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

Reference

FixedPage Members
Intersoft.Client.Documents Namespace