Your Casino History is located within your main account section.
To access this click  > History > Casino History or click here.

For the Blackjack Slider game, you will be able to see the cards both you and the dealer were dealt. For the Roulette Slider game, you can see what you had bet on along with the winning number.

This will also show you the outcome of every bet placed in the Casino along with your overall profit/loss for selected time periods so you can track your spend more easily.