How to integrate an external web ASP.NET control into a SharePoint application's page?

Question

How to integrate an external web ASP.NET control into a SharePoint application's page?

Answer 1

What did you mean by External Website's control? You can use the page view webpart to load an external page/ Is this what you are looking for?

Answer 2

Have you seen this article about creating an Application page?

Essentially, inside your application page you can reference the DLL:

<%@ Assembly Name="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c"%>

Then register a tag prefix:

<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

Then you can use your controls:

<SharePoint:EncodedLiteral runat="server" text="<%$Resources:wss,approve_pagetitle%>" EncodeMethod='HtmlEncode'/>

Instead of SharePoint, you'll be using the DLL that contains your ASP.NET web controls.