AppearanceObject Class

using DevExpress.ExpressApp.ConditionalAppearance;
using DevExpress.ExpressApp.Editors;
//...
public partial class ConditionalAppearanceController : ViewController {
    public ConditionalAppearanceController() {
        InitializeComponent();
    }
    private AppearanceController appearanceController;
    protected override void OnActivated() {
        base.OnActivated();
        appearanceController = Frame.GetController<AppearanceController>();
        if (appearanceController != null) {
            appearanceController.CustomApplyAppearance += 
                new EventHandler<ApplyAppearanceEventArgs>(
                    appearanceController_CustomApplyAppearance);
        }
    }
    void appearanceController_CustomApplyAppearance (
        object sender, ApplyAppearanceEventArgs e) {
            //Customize the AppearanceObject
            //Apply the modified appearance
            foreach(AppearanceItemBase appearanceItem in e.AppearanceObject.Items) {
                appearanceItem.Apply(e.Item);
            }
    }
    protected override void OnDeactivated() {
        if (appearanceController != null) {
            appearanceController.CustomApplyAppearance -=
                 new EventHandler<ApplyAppearanceEventArgs>(
                     appearanceController_CustomApplyAppearance);
        }
        base.OnDeactivated();
    }
}

Imports DevExpress.ExpressApp.ConditionalAppearance
Imports ConditionalAppearanceExample.Module.BusinessObjects
Imports DevExpress.ExpressApp.Editors
'...
Partial Public Class ConditionalAppearanceController
        Inherits ViewController
    Public Sub New()
        InitializeComponent()
    End Sub
    Private appearanceController As AppearanceController
    Protected Overrides Sub OnActivated()
        MyBase.OnActivated()
        appearanceController = Frame.GetController(Of AppearanceController)()
        If appearanceController IsNot Nothing Then
             AddHandler appearanceController.CustomApplyAppearance, _
             AddressOf appearanceController_CustomApplyAppearance
        End If
    End Sub
    Private Sub appearanceController_CustomApplyAppearance( _
    ByVal sender As Object, ByVal e As ApplyAppearanceEventArgs)
        'Customize the AppearanceObject
        'Apply the modified appearance
        For Each appearanceItem As AppearanceItemBase In e.AppearanceObject.Items
                appearanceItem.Apply(e.Item)
        Next appearanceItem
    End Sub
    Protected Overrides Sub OnDeactivated()
        If appearanceController IsNot Nothing Then
            RemoveHandler appearanceController.CustomApplyAppearance, _
            AddressOf appearanceController_CustomApplyAppearance
        End If
        MyBase.OnDeactivated()
    End Sub
End Class