# OnClientTaskMoveStart

The **OnClientTaskMoveStart** occurs when the Task moving is started.

The event handler receives two parameters:

1. The instance of the **Gantt** control firing the event.

2. An **eventArgs** parameter containing the following methods:

* **get_task** return the current moved task.

* **set_cancel** lets you cancel the event and prevent the task moving.

```ASP.NET
<telerik:RadGantt RenderMode="Lightweight" runat="server" id="RadGantt1" OnClientTaskMoveStart="OnClientTaskMoveStart">
</telerik:RadGantt>
```

```JavaScript
function OnClientTaskMoveStart(sender, eventArgs) {
    args.set_cancel(true);
}
```

## See Also

* [Client-Side Basics](https://www.telerik.com/products/aspnet-ajax/documentation/controls/gantt/client-side-programming/overview)

* [Client-Side Events](https://www.telerik.com/products/aspnet-ajax/documentation/controls/gantt/client-side-programming/events/overview)