# Checking on Demand

> Open a spelling dialog from a WPF button: TextControl.SpellCheckDialog, SpellCheckDialog.Show for TX Text Control, and Check with Show(Window) for a TextBox.

- **Product:** TX Spell .NET for WPF
- **Section:** Documentation
- **Kind:** Topic
- **Path:** TX Spell .NET for WPF > Spell Checking > Checking on Demand
- **Web URL:** https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/on-demand/
- **LLMs URL:** https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/on-demand/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/on-demand/llms-full.txt

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## On This Page

- [Two Dialogs to Choose From](https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/on-demand/#two-dialogs-to-choose-from)
- [Open the Dialog of TX Text Control](https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/on-demand/#open-the-dialog-of-tx-text-control)
- [Open the Dialog of TX Spell .NET](https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/on-demand/#open-the-dialog-of-tx-spell-net)
- [Check a TextBox in the Dialog](https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/on-demand/#check-a-textbox-in-the-dialog)
- [Control When the Dialog Closes](https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/on-demand/#control-when-the-dialog-closes)
- [Next Steps](https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/on-demand/#next-steps)

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## Nearby

- **Previous:** [As-You-Type Checking](https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/as-you-type/llms.txt)
- **Next:** [Incorrect Words and Suggestions](https://docs.textcontrol.com/tx-spell-dotnet-wpf/spell-checking/suggestions/llms.txt)