public static void Exec(MercatorUi.MovableControls.MovableButton clickedButton)
{
// enter your customized code here
MercatorUi.Forms.Billing.BillingForm billingForm = (MercatorUi.Forms.Billing.BillingForm)clickedButton.Form;
if (!billingForm.BillingEngine.ReadOnly)
{
billingForm.BillingEngine.ChangeAllItemData();
billingForm.BillingEngine.ChangeAllPrices();
}
}