# Visual Studio Toolbox and Designer

> Declare the WPF TXSpellChecker as a XAML resource instead of a toolbox item, connect TextControl by its key and get the spell checker with FindResource.

- **Product:** TX Spell .NET for WPF
- **Section:** Documentation
- **Kind:** Topic
- **Path:** TX Spell .NET for WPF > Installation Guide > Visual Studio Toolbox and Designer
- **611 words**
- **Web URL:** https://docs.textcontrol.com/tx-spell-dotnet-wpf/installation/toolbox/
- **LLMs URL:** https://docs.textcontrol.com/tx-spell-dotnet-wpf/installation/toolbox/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-spell-dotnet-wpf/installation/toolbox/llms-full.txt

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In WPF, TX Spell .NET has no toolbox item. The spell checker is not a visual element: you declare it in XAML as a resource of the window and connect the `TextControl` of TX Text Control to it by its key. The XAML designer and the **Properties** window then work with the controls of TX Text Control as usual.

### No Toolbox Item

The package `TXTextControl.TXSpell.WPF.SDK` adds nothing to the toolbox, and neither does `TXTextControl.TXSpell.Core.SDK`. The controls of TX Text Control, such as the `TextControl`, `ButtonBar` and `RulerBar`, come from the toolbox tab of TX Text Control. When you add the first of them, Visual Studio adds a reference to the project, and the XAML designer asks to be restarted before it can use its types: click **OK**, then choose **Build** > **Build Solution**.

![A message of Visual Studio that the reference TXTextControl.WPF has been added and the XAML Designer must be restarted, with an OK button.](https://docs.textcontrol.com/assets/img/tx-spell-dotnet-wpf/xaml-designer-restart.4a51fad6.webp)

### Declare the Spell Checker in XAML

Instead of a toolbox item, you map the namespace `TXTextControl.WPF.Proofing` of the assembly *TXSpell.WPF* to a prefix, declare a [TXSpellChecker](https://docs.textcontrol.com/tx-spell-dotnet-wpf/reference/txtextcontrol-wpf-proofing/txspellchecker/llms-full.txt) in the resources of the window, and name its key in the [SpellChecker](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-wpf/textcontrol/spellchecker-property/llms-full.txt) property of the `TextControl`. [Connect the Spell Checker in XAML](https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/as-you-type/#connect-the-spell-checker-in-xaml) shows the markup, and [Use the Spell Checker in Code](https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/as-you-type/#use-the-spell-checker-in-code) how the code-behind gets the resource with `FindResource`.

The prefix of TX Text Control, here `WPF`, is the one Visual Studio adds when you place the first control from its toolbox tab:

![The XAML of a window with xmlns:WPF mapped to TXTextControl.WPF and a WPF:TextControl element inside a DockPanel.](https://docs.textcontrol.com/assets/img/tx-spell-dotnet-wpf/xaml-textcontrol-dockpanel.1d894568.webp)

[Create Your First WPF Application](https://docs.textcontrol.com/tx-spell-dotnet-wpf/getting-started/tx-text-control/first-application/llms-full.txt) builds the complete window step by step.

### Licensing in the Designer

- **.NET 8 or higher.** The package embeds its license file into your assembly, so no *licenses.licx* entry is needed.
- **.NET Framework.** The project's *licenses.licx* file needs an entry for the spell checker; [Development Licenses](https://docs.textcontrol.com/tx-spell-dotnet-wpf/installation/licensing/development/llms-full.txt) shows it.

### Next Steps

- [Create Your First WPF Application](https://docs.textcontrol.com/tx-spell-dotnet-wpf/getting-started/tx-text-control/first-application/llms-full.txt): the spell checker in a window with TX Text Control.
- [Toolbox and Designer](https://docs.textcontrol.com/tx-spell-dotnet-wpf/troubleshooting/toolbox/llms-full.txt): when the spell checker isn't known in XAML or spell checking doesn't start.
- [Installing Dictionaries and Language Data](https://docs.textcontrol.com/tx-spell-dotnet-wpf/installation/language-data/llms-full.txt): the files the spell checker reads.

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## Nearby

- **Previous:** [Installing and Updating Packages](https://docs.textcontrol.com/tx-spell-dotnet-wpf/installation/nuget/install-update/llms-full.txt)
- **Next:** [Installing Dictionaries and Language Data](https://docs.textcontrol.com/tx-spell-dotnet-wpf/installation/language-data/llms-full.txt)