# TextControl.FormFieldCheckChanged Event

> Occurs when the checkmark of a CheckFormField has been changed from checked to unchecked or vice versa. The event handler receives an argument of type CheckFormFieldEventArgs containing data related to this event. The event does not occur, when the CheckFormfield.Checked property has been used to change the checkmark.

- **Product:** TX Text Control .NET for WPF
- **Section:** Reference
- **Kind:** Event
- **Introduced:** 28.0
- **Namespace:** `TXTextControl.WPF`
- **Package:** `TXTextControl.TextControl.WPF.SDK` (assembly `TXTextControl.WPF.dll`, from the private NuGet feed or Text Control Offline Packages)
- **.NET Framework:** reference `TXTextControl.WPF.dll` from the setup
- **Path:** TX Text Control .NET for WPF > Reference > TXTextControl.WPF > TextControl.FormFieldCheckChanged Event
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-wpf/textcontrol/formfieldcheckchanged-event/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-wpf/textcontrol/formfieldcheckchanged-event/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-wpf/textcontrol/formfieldcheckchanged-event/llms-full.txt

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## On This Page

- [Description](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-wpf/textcontrol/formfieldcheckchanged-event/#description)
- [Syntax](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-wpf/textcontrol/formfieldcheckchanged-event/#syntax)
- [Examples](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-wpf/textcontrol/formfieldcheckchanged-event/#examples)

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## Nearby

- **Previous:** [TextControl.FormattingStylesDialog Method](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-wpf/textcontrol/formattingstylesdialog-method/llms.txt)
- **Next:** [TextControl.FormFieldDateChanged Event](https://docs.textcontrol.com/tx-text-control-dotnet-wpf/reference/txtextcontrol-wpf/textcontrol/formfielddatechanged-event/llms.txt)