How to set Custom Web Template in Global.asax from Module.Web Project.

Hey Michael,
Thanks for your reply. I was wondering, if you would already have a sample project or reference link which would have this functionality. If yes, would it possible for you to provide it to me for my reference and better understanding.
Thanks in advance.

I am afraid we do not have such an example. Moreover, it seems to be impossible to put a web control declared in markup into an assembly. There is a tricky way to convert a user control to custom control, though. Refer to the Turning an .ascx User Control into a Redistributable Custom Control MSDN article.

Michael, I believe XAF also does what I am interested in. In XAF, by default, the template content (Default, Logon etc) of ASP.NET applications is provided by User Controls embedded into the DevExpress.ExpressApp.Web. So how does this user control declared in another assembly work?
All I want is to create my user control in MyProject.Module.Web so that it is reusable in an another application by referencing MyProject.Module.Web dll.

Yes, XAF contains these templates in a Web module assembly. The source code of these controls was generated from design-time-declared ascx user controls using a proprietary tool.
So, if you want to include custom web controls into a redistributable assembly, either create a custom control by writing code (which is not a simple task), or use the technique described in the MSDN article I referred to.

Hi,
I am exploring the possibilities of following the MSDN article you provided to convert the MyDefaultVerticalTemplateContent.ascx to a custom control. I am little confused/unclear with how the custom control will get linked to my XAF application. As in what exactly I will need to do to get everything working with XAF app. Can you please assist me with little detailed steps to accomplish my requirement?
Thanks in advance.

Once you get your ascx control converted to a custom control class, you need to modify Default.aspx by overriding the BaseXafPage.InitContent method to instantiate your content control as follows:

C#
protected override void InitContent() {  
    if (WebApplication.Instance != null && !WebApplication.Instance.IsLoggedOn) {  
        WebWindowTemplateHttpHandler.CurrentRequestTemplateType = TemplateType.Logon;  
        base.InitContent();  
        return;  
    }  
    if (WebWindowTemplateHttpHandler.CurrentRequestTemplateType == TemplateType.Vertical) {  
        this.templateContent = new MyDefaultVerticalTemplateContent();  
        this.templateContent.ID = WebWindowTemplateHttpHandler.CurrentRequestTemplateType.ToString();  
        this.InnerContentPlaceHolder.Controls.Add(this.templateContent);  
    } else {  
        base.InitContent();  
    }  
}  

As per solution provided I have converted DefaultVerticalTemplate as custom control from user control. I have dragged and register User Control on Default.aspx and then Override InitContent ()
//this.templateContent = new DefaultVerticalTemplateContent1(); // when I write code like this then it gives me run-time exception because all the control which are define on this template was getting null value… so I have used the below code this.templateContent = DefaultVerticalTemplateContent;// After that it starts working.
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In demo I have created 2 extra folders "UserControlDLL" and "UserControlPublish" which contains DLL of publish user control and location where to Publish UserControl respectively. I am using ref of Publish DLL of usercontrol from "UserControlDLL" folder in Solution.Web