FixedWidthComboBox Class

C#
Visual Basic (Declaration)

public class FixedWidthComboBox : System.Windows.Controls.ComboBox, System.ComponentModel.ISupportInitialize, System.Windows.Controls.Primitives.IContainItemStorage, System.Windows.IFrameworkInputElement, System.Windows.IInputElement, System.Windows.Markup.IAddChild, System.Windows.Markup.IQueryAmbient, System.Windows.Media.Animation.IAnimatable

Public Class FixedWidthComboBox 
   Inherits System.Windows.Controls.ComboBox
   Implements System.ComponentModel.ISupportInitialize, System.Windows.Controls.Primitives.IContainItemStorage, System.Windows.IFrameworkInputElement, System.Windows.IInputElement, System.Windows.Markup.IAddChild, System.Windows.Markup.IQueryAmbient, System.Windows.Media.Animation.IAnimatable

System.Object
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         System.Windows.Media.Visual
            System.Windows.UIElement
               System.Windows.FrameworkElement
                  System.Windows.Controls.Control
                     System.Windows.Controls.ItemsControl
                        System.Windows.Controls.Primitives.Selector
                           System.Windows.Controls.ComboBox
                              ArcGIS.Desktop.GeoProcessing.FixedWidthComboBox

Target Platforms: Windows 10, Windows 8.1, Windows 7

Reference

FixedWidthComboBox Members
ArcGIS.Desktop.GeoProcessing Namespace