# CannotTrackChangeCallback Function

> Callback function that provides data for the CannotTrackChange event. (see also TXTextControl.addEventListener function)

- **Product:** TX Text Control .NET Server
- **Section:** Reference
- **Kind:** Function
- **Introduced:** 28.0
- **Path:** TX Text Control .NET Server > Reference > JavaScript API > CannotTrackChangeCallback Function
- **202 words**
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/cannottrackchangecallback/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/cannottrackchangecallback/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/cannottrackchangecallback/llms-full.txt

---

### Description

Callback function that provides data for the CannotTrackChange event. (see also [TXTextControl.addEventListener function](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol/addeventlistener-method/llms-full.txt))

### Syntax

```javascript
function(<String> defaultMessage)
```

### Examples

The following example demonstrates `CannotTrackChangeCallback` in a practical document-editing workflow. Callback function that provides data for the CannotTrackChange event. (see also TXTextControl.addEventListener function).

```javascript
function cannotTrackChangeCallback(defaultMessage) {
    console.log("default message:", defaultMessage);
}
```

---

## Nearby

- **Previous:** [Javascript: BarcodeTypeSettings.setShowCheckValue Method](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/barcodetypesettings/setshowcheckvalue-method/llms-full.txt)
- **Next:** [ChartCallback Function](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/chartcallback/llms-full.txt)