FormControl Sender object

Hi

When an event is override, the codes are added in a new class e.g

[FormControlEventHandler(formControlStr(SalesCreateOrder, OK), FormControlEventType::Clicked)]
public static void OK_OnClicked(FormControl sender, FormControlEventArgs e)
{}

From the sender, i need to retrieve the customer account and the agreement id.

How to get this data from this object?

Thanks.

Regards,

JB