Create a popup message asking a Yes or No question in GWT

I want a popup window asking the 开发者_运维技巧user to a yes or no question when he click a button.

public void onClick(ClickEvent event){
     deleteUser();
}//this lets user to delete a certain user when they click a button, but there is no question asking if they really want to delete this user. 

I want a new small popup window (such as JFrame in Java Swing) asking Are you sure you want to delete this user? with a Yes or No button.

I'm developing in GWT.

Thank you

Apart from implementing a dialog with PopupPanel, I guess the best you can get is Window.confirm() (from com.google.gwt.user.client).