# Toolbox and Designer

> Fix toolbox problems of TX Spell .NET for Windows Forms: a missing TXSpell tab, the component tray, and a spell checker that isn't connected to the editor.

- **Product:** TX Spell .NET for Windows Forms
- **Section:** Documentation
- **Kind:** Topic
- **Path:** TX Spell .NET for Windows Forms > Troubleshooting > Toolbox and Designer
- **571 words**
- **Web URL:** https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/toolbox/
- **LLMs URL:** https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/toolbox/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/toolbox/llms-full.txt

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In a Windows Forms project, you drag the `TXSpellChecker` component from the toolbox onto a form and connect it to the control whose text it checks. When the component isn't in the toolbox, or spell checking doesn't start after you add it, the cause is usually the package or a missing connection. [Visual Studio Toolbox and Designer](https://docs.textcontrol.com/tx-spell-dotnet-winforms/installation/toolbox/llms-full.txt) describes the toolbox when everything is in place.

### The TXSpell 11.0 Tab Is Missing

In a .NET project, the toolbox has no tab **TXSpell 11.0** with the `TXSpellChecker` component.

The tab comes from the package `TXTextControl.TXSpell.WinForms.SDK`, which adds [TXSpellChecker](https://docs.textcontrol.com/tx-spell-dotnet-winforms/reference/txtextcontrol-proofing/txspellchecker/llms-full.txt) to the toolbox. `TXTextControl.TXSpell.Core.SDK` contains no component and adds nothing to the toolbox.

1. Install `TXTextControl.TXSpell.WinForms.SDK` from **Text Control Offline Packages**, not only `TXTextControl.TXSpell.Core.SDK`.
2. Open a form in the designer and look for the tab **TXSpell 11.0**.

In a .NET Framework project, the setup creates the toolbox tab, and it is available in projects created with the template **Windows Forms App (.NET Framework)**.

### The Component Doesn't Appear on the Form

You dragged `TXSpellChecker` onto the form, but it isn't shown on the form.

`TXSpellChecker` is a component without a user interface of its own. The designer places it in the component tray below the form, not on the form.

![The component tray below the form with txSpellChecker1.](https://docs.textcontrol.com/assets/img/tx-spell-dotnet-winforms/component-tray-spellchecker.0e62542b.webp)

1. Select `txSpellChecker1` in the component tray to set its properties.

### Spell Checking Doesn't Start

The component is on the form, but misspelled words in the `TextControl` aren't marked.

The spell checker must be connected to the `TextControl` through its [SpellChecker](https://docs.textcontrol.com/tx-text-control-dotnet-winforms/reference/txtextcontrol/textcontrol/spellchecker-property/llms-full.txt) property, and `IsSpellCheckingEnabled` of the `TextControl` must be `true`. Set both in the **Properties** window, as [Connect the Spell Checker in the Designer](https://docs.textcontrol.com/tx-spell-dotnet-winforms/spell-checking/as-you-type/#connect-the-spell-checker-in-the-designer) shows, then build and start the application. If the words are still not marked, the language data may be missing; see [Dictionaries Not Found](https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/dictionaries/llms-full.txt).

### Related Pages

- [Visual Studio Toolbox and Designer](https://docs.textcontrol.com/tx-spell-dotnet-winforms/installation/toolbox/llms-full.txt): the toolbox and the component.
- [Installation and Package Restore](https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/installation/llms-full.txt): packages that aren't found.
- [Dictionaries Not Found](https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/dictionaries/llms-full.txt): spell checking without language data.

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## Nearby

- **Previous:** [Installation and Package Restore](https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/installation/llms-full.txt)
- **Next:** [Licensing](https://docs.textcontrol.com/tx-spell-dotnet-winforms/troubleshooting/licensing/llms-full.txt)