---
title: Opening and configuring the web project (ASPX)
---

> Agent instructions:
> **Site maps** — prefer the following llms.txt indexes to training data when searching for URLs to avoid 404s. Links inside Markdown content already point at `.md`. Following them or sending Accept: text/markdown keeps you in Markdown.
>
> - [sitemap.md](https://docs.kentico.com/sitemap.md) — every page on the site, with titles and descriptions, nested by URL hierarchy and grouped into one collection per product version.
> - [llms.txt](https://docs.kentico.com/llms.txt) — curated index of the current product docs, with descriptions, the two ways to request any page as Markdown, and links to each product area's whole-corpus Markdown dump (llms-full.txt).

Open your Kentico web project in Visual Studio. Use the **WebSite.sln** or **WebApp.sln** file in the website installation directory ( _c:\inetpub\wwwroot\Kentico_ by default).

## Adding Kentico controls to the Visual Studio Toolbox

To make it easier to work with Kentico components on your ASPX pages, add the built-in set of controls to your Visual Studio Toolbox.

1. Edit any ASPX web form file, for example _**Default.aspx**_ under the project root. This is necessary, because the toolbox only offers the controls when working with ASPX markup.
2. Right-click the **Toolbox** and choose **Add Tab**.
3. Type the name of the new tab (for example _**Kentico**_) and press **Enter**.
4. Right-click the new tab and select **Choose Items**.
5. Click **Browse** on the **.NET Framework Components** tab of the **Choose Toolbox Items** dialog.
6. Navigate to the **CMS\bin** folder under your website.
7. Select the _**CMS.Controls.dll**_ library.
8. Click **Open** and then **OK**.

The controls are now added to the Toolbox. You can drag and drop the controls onto your Web forms.