Qt colleagues

please inform me, how to:
1) create more than 1 "window", in the same application
2) use 1 window as a "control window" to call other windows
ie. each window does something else according to selection from the "controlling window"
3) Hence connecting connecting a "Push Button click" to open a new different window.

Is it possible, to create all the windows in qt Creator(drag and drop)

Ideas Welcome

Thanks