GET_ACTION_CONF - Popup buttons

Hi All,

When I add a confirmation message to my action in the POWL using the GET_ACTION_CONF method of the IF_POWL_FEEDER interface, I get the below popup.

But the popup has these 3 buttons, but I want to restrict it to just 'Yes' and 'No'. I want to get rid of the 'Cancel' button. Has anyone done this before? Any suggestions?

Thanks