i have to change all the buttons which are coming when we are using QMessageBox in the application . the text message is changed by using tr but the OK , yes, No buttons can not be changed. so how can i do this?

my mentor said u hav to create a class and derive it from QMessageBox and then remove that buttons and add ur own buttons. but how can i do that. means i have using it in one way which the other sir told me in the forum.