![](dotnetdiagramimages/C1_WPF_RichTextBox_Toolbar_4_6_2_C1_WPF_RichTextBox_C1LengthTool.png)
'Declaration
Public MustInherit Class C1LengthTool Inherits System.Windows.Controls.Control Implements IUpdateableTool
public abstract class C1LengthTool : System.Windows.Controls.Control, IUpdateableTool
System.Object
System.Windows.Threading.DispatcherObject
System.Windows.DependencyObject
System.Windows.Media.Visual
System.Windows.UIElement
System.Windows.FrameworkElement
System.Windows.Controls.Control
C1.WPF.RichTextBox.C1LengthTool
C1.WPF.RichTextBox.C1ColumnWidthTool
C1.WPF.RichTextBox.C1RowHeightTool
C1.WPF.RichTextBox.C1TableWidthTool