![Avatar](https://secure.gravatar.com/avatar/5303e345fa7b825abc224ee6398595fb.jpg?s=64&d=identicon&r=g)
Hi,I have two windows,window1 contains a documentwindow, window2 contains a documentwindow,now I want to drag the documentwindow in window1 to window2,so the window2 will have two documentwindows and the window1 will have no documentwindow,How can I do this?