Greeting,

I've create desktop.aspx like below :
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="desktop.aspx.cs" Inherits="WebApplication1.desktop" %>


<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!X.IsAjaxRequest)
        {
            var curTheme = Ext.Net.ResourceManager.GetInstance(HttpContext.Current);

            switch (curTheme.Theme)
            {
                case Ext.Net.Theme.Triton:
                    this.toolbarMnu.Height = 50;
                    break;
                case Ext.Net.Theme.Classic:
                    this.toolbarMnu.Height = 35;
                    break;
                case Ext.Net.Theme.CrispTouch:
                case Ext.Net.Theme.NeptuneTouch:
                    Desktop1.TaskBar.QuickStartWidth = 84;
                    Desktop1.TaskBar.TrayWidth = 127;
                    break;
                case Ext.Net.Theme.Crisp:
                case Ext.Net.Theme.Neptune:
                    Desktop1.TaskBar.QuickStartWidth = 64;
                    Desktop1.TaskBar.TrayWidth = 114;
                    break;
            }
        }
    }

    protected void Logout_Click(object sender, DirectEventArgs e)
    {
        
        this.Response.Redirect("startup.aspx");
    }

    [DirectMethod(ShowMask = true)]
    public void createwinappme(string idmn, string wtitle, string waction, int wheight, int wwidth)
    {
        Desktop.GetInstance().CreateWindow(new Window
        {
            ID = idmn,
            Height = wheight,
            Width = wwidth,
            Maximizable = false,
            Resizable = false,
            Title = wtitle,
            Icon = Icon.TableGear,
            CloseAction = CloseAction.Destroy,
            Modal = true,
            Layout = "FitLayout",
            Loader = new ComponentLoader
            {
                Url= waction,
                Mode = LoadMode.Frame,
                LoadMask =
                {
                    ShowMask = true
                }
            }

        });
    }

</script>

<!DOCTYPE html>

<html>
<head runat="server">
    <title>Aplikasi Aset (BMD) ... </title>

    <script type="text/javascript" src="~/Content/CommonUtil.js"></script>
    <link href="~/Content/font-awesome.css" rel="stylesheet" />
    <link href="~/resources/desktop.css" rel="stylesheet" />
    <style type="text/css">
        /* wraps over the x-fa CSS class to match the reference from the Triton/Graphite themes */
        .x-fa {
          display: inline-block;
          font: 18px;
          font-size: inherit;
          text-rendering: auto;
          -webkit-font-smoothing: antialiased;
          -moz-osx-font-smoothing: inherit;
        }
    </style>

    <script>
        var tile = function () {
            Ext.net.Desktop.desktop.tileWindows();
        };

        var cascade = function () {
            Ext.net.Desktop.desktop.cascadeWindows();
        };

    </script>
</head>
<body>
        <ext:ResourceManager runat="server" Theme="Classic" ></ext:ResourceManager>

        <ext:Desktop ID="Desktop1" runat="server" >

            <DesktopConfig Wallpaper="~/resources/wallpapers/desk.jpg" ShortcutDragSelector="true" >
                <Content>

                </Content>
            </DesktopConfig>

            <StartMenu Title="Ext.Net Desktop" Icon="Application" Height="200" Hidden="true" >
                <ToolConfig>
                    <ext:Toolbar ID="StartMenuToolbar" runat="server" Width="100">
                        <Items>
                            <ext:Button runat="server" Text="Settings" Icon="Cog" />
                            <ext:Button runat="server" Text="Logout" Icon="Key">
                                <DirectEvents>
                                    <Click OnEvent="Logout_Click">
                                        <EventMask ShowMask="true" Msg="Good Bye..." MinDelay="1000" />
                                    </Click>
                                </DirectEvents>
                            </ext:Button>
                        </Items>
                    </ext:Toolbar>
                </ToolConfig>
            </StartMenu>

            <TaskBar QuickStartWidth="0" TrayWidth="50" Dock="Top" >
                <QuickStart>
                    <ext:Toolbar ID="MnToolbar" runat="server">

                    </ext:Toolbar>
                </QuickStart>
                <Tray>

                </Tray>
                
            </TaskBar>
        </ext:Desktop>
</body>
</html>
I want to hide start button using -- > Handler="Ext.get('ux-taskbar-start').addClass('x-hide-display');"

and I put <Listeners> </Listener> :
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="desktop.aspx.cs" Inherits="WebApplication1.desktop" %>


<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!X.IsAjaxRequest)
        {
            var curTheme = Ext.Net.ResourceManager.GetInstance(HttpContext.Current);

            switch (curTheme.Theme)
            {
                case Ext.Net.Theme.Triton:
                    this.toolbarMnu.Height = 50;
                    break;
                case Ext.Net.Theme.Classic:
                    this.toolbarMnu.Height = 35;
                    break;
                case Ext.Net.Theme.CrispTouch:
                case Ext.Net.Theme.NeptuneTouch:
                    Desktop1.TaskBar.QuickStartWidth = 84;
                    Desktop1.TaskBar.TrayWidth = 127;
                    break;
                case Ext.Net.Theme.Crisp:
                case Ext.Net.Theme.Neptune:
                    Desktop1.TaskBar.QuickStartWidth = 64;
                    Desktop1.TaskBar.TrayWidth = 114;
                    break;
            }
        }
    }

    protected void Logout_Click(object sender, DirectEventArgs e)
    {
        
        this.Response.Redirect("startup.aspx");
    }

    [DirectMethod(ShowMask = true)]
    public void createwinappme(string idmn, string wtitle, string waction, int wheight, int wwidth)
    {
        Desktop.GetInstance().CreateWindow(new Window
        {
            ID = idmn,
            Height = wheight,
            Width = wwidth,
            Maximizable = false,
            Resizable = false,
            Title = wtitle,
            Icon = Icon.TableGear,
            CloseAction = CloseAction.Destroy,
            Modal = true,
            Layout = "FitLayout",
            Loader = new ComponentLoader
            {
                Url= waction,
                Mode = LoadMode.Frame,
                LoadMask =
                {
                    ShowMask = true
                }
            }

        });
    }

</script>

<!DOCTYPE html>

<html>
<head runat="server">
    <title>Aplikasi Aset (BMD) ... </title>

    <script type="text/javascript" src="~/Content/CommonUtil.js"></script>
    <link href="~/Content/font-awesome.css" rel="stylesheet" />
    <link href="~/resources/desktop.css" rel="stylesheet" />
    <style type="text/css">
        /* wraps over the x-fa CSS class to match the reference from the Triton/Graphite themes */
        .x-fa {
          display: inline-block;
          font: 18px;
          font-size: inherit;
          text-rendering: auto;
          -webkit-font-smoothing: antialiased;
          -moz-osx-font-smoothing: inherit;
        }
    </style>

    <script>
        var tile = function () {
            Ext.net.Desktop.desktop.tileWindows();
        };

        var cascade = function () {
            Ext.net.Desktop.desktop.cascadeWindows();
        };

    </script>
</head>
<body>
        <ext:ResourceManager runat="server" Theme="Classic" ></ext:ResourceManager>

        <ext:Desktop ID="Desktop1" runat="server" >

            <DesktopConfig Wallpaper="~/resources/wallpapers/desk.jpg" ShortcutDragSelector="true" >
                <Content>

                </Content>
            </DesktopConfig>

            <StartMenu Title="Ext.Net Desktop" Icon="Application" Height="200" Hidden="true" >
                <ToolConfig>
                    <ext:Toolbar ID="StartMenuToolbar" runat="server" Width="100">
                        <Items>
                            <ext:Button runat="server" Text="Settings" Icon="Cog" />
                            <ext:Button runat="server" Text="Logout" Icon="Key">
                                <DirectEvents>
                                    <Click OnEvent="Logout_Click">
                                        <EventMask ShowMask="true" Msg="Good Bye..." MinDelay="1000" />
                                    </Click>
                                </DirectEvents>
                            </ext:Button>
                        </Items>
                    </ext:Toolbar>
                </ToolConfig>
            </StartMenu>

            <TaskBar QuickStartWidth="0" TrayWidth="50" Dock="Top" >
                <QuickStart>
                    <ext:Toolbar ID="MnToolbar" runat="server">

                    </ext:Toolbar>
                </QuickStart>
                <Tray>

                </Tray>
                
            </TaskBar>
            <Listeners>
                <Ready Handler="Ext.get('ux-taskbar-start').addClass('x-hide-display');" />
            </Listeners>
        </ext:Desktop>
</body>
</html>

but why become blank like picture below
Click image for larger version.  Name: blank_desktop.png  Views: 102  Size: 13.4 KB  ID: 25362

Are there any solution ... ?? Thank you ...