Windows 7: What encoding does powerpoint use?

Does anyone know hat encoding powerpoint uses?

I would like to get some poweroint text as utf-8 but I dont know what encoding it uses so I have to manually replace every symbol. Is there way to convert whole powerpoint file to utf-8? Or if anyone konws what encoding it does use I could google for converter.

Edit: I figured it mught be firefox that doesnt paste UFT-8 correctly

Basically my problem is that when I paste from powerpoint to firefox I get garbage text. If i use IE i get that extra html that I dont need.