Selection

I’m currently in ‘face’ selection mode which I used to extrude faces.
Now I want to select and move the whole object - but I don’t want to have to select each and every face, vertex or edge to do it.
I have 3 selection boxes on my interface - edge, vertex and face.
I can easily switch between these selection modes - but I don’t want any of them - I want to select the whole object.

My question is really simple - How do I get to ‘Object’ selection mode?