camera aspect ratio

Hey I think this is a simple question, but how do you change the aspect ratio of the camera game object?

What I’ve done to get the GE view to the ratio I want (say 800x600) is switch the mode from Blender Game, back to Blender Render. Then, under the render panel (the camera icon), in the dimensions drop-down, change the x and y resolutions.
Does that fix it?

Mark it as solved.