How to rotate Widgets in the FLUID gui editor

I'm following this tutorial (page 98) and i'm having a lot of trouble. It seems to be a bit dated or something, but what is troubling me at the moment is that it tells me t开发者_开发问答o

add the following to the CubeViewUI
constructor:
• A horizontal roller named hrot
• A vertical roller named vrot
• A horizontal slider named xpan
• A vertical slider named ypan
• A horizontal value slider named zoom

and doesn't say how, just showing a picture on how it should look when i'm finished.

I'm looking all through the properties page of my hrot roller but can't find any option to make it horizontal. How do i do this??

Under properties, click the C++ tab, and in the upper right, there's a chooser for Vertical and Horizontal.