What does Macbeth do to try to bring the prophecy of his becoming "king hereafter" to reality?

Macbeth's first course of action--suggested and supported by Lady Macbeth--is to kill King Duncan and Duncan's two guards in order to create the opportunity for obtaining the title.  When Macbeth becomes aware that Banquo suspects he is the assassin, he arranges to have Banquo and his son Fleance killed as well.  Fortunately, Fleance escapes, foiling Macbeth's attempt to subvert the witches' prophecy that Banquo would be the father of kings and solidifying his claim and his potential heirs' claim to the crown.  After consulting with the witches a second time, Macbeth decides to have Macduff and his family killed, but to no avail.  Macduff joins with Malcolm to defeat Macbeth.