Text alignment

[oddjobz]

I have a basic application working, essentially a block of text (description) followed by a slider, followed by "ok" / "cancel". Can anyone tell me;

a. How do I centre a text block / how do I insert a centred line of text in a window?
b. How to I right justify the contents of a box, so for example how to I get ok/cancel in the bottom right of my window rather than bottom left?

Positioning control aside, this is looking very interesting / exciting .. ! :)