---
title: "History..::.changed Event"
canonical: https://www.graphicsmill.com/docs/gm5/E_J_Aurigma_GraphicsMill_AjaxControls_VectorObjects_RedoUndo_History_changed.htm
product: "Graphics Mill 5.5 for .NET"
---

This documentation is for the old version. [Go to the latest Graphics Mill docs](https://www.graphicsmill.com/docs/gm/)

# History.changed Event
 
Fires when the history is changed.
 
**Namespace:** [Aurigma.GraphicsMill.AjaxControls.VectorObjects.RedoUndo](https://www.graphicsmill.com/docs/gm5/N_J_Aurigma_GraphicsMill_AjaxControls_VectorObjects_RedoUndo.htm.md)
 **Assembly:** Aurigma.GraphicsMill.AjaxControls.VectorObjects (in Aurigma.GraphicsMill.AjaxControls.dll)
 
## Syntax
  
```
function add_changed(value);
function remove_changed(value);
```
   
## See Also

### Reference

- [History Class](https://www.graphicsmill.com/docs/gm5/T_J_Aurigma_GraphicsMill_AjaxControls_VectorObjects_RedoUndo_History.htm.md)
- [Aurigma.GraphicsMill.AjaxControls.VectorObjects.RedoUndo Namespace](https://www.graphicsmill.com/docs/gm5/N_J_Aurigma_GraphicsMill_AjaxControls_VectorObjects_RedoUndo.htm.md)