If you're very slim, it can create curves, but for plus size women, this same dress style flows away from the body's lower half, deemphasizing hips and thighs.
2
The key is to choose shorts that accentuate your finer points while deemphasizing areas you'd rather not draw attention to.
3
What you want from plus size evening wear is the same thing you want from all your clothes - to call attention to the best parts of your figure while deemphasizing others.