How to enable accessibility for dynamic captivate window

[Velayutham23207238m26x]

Hi Team, 

I have created a set of quiz with 'Submit All' option. The below Captivate dynamic window is appearing after the last quiz attempted. My question is how to enable the accessbility for the captivate dynamic window so that learner can use TAB and SPACE keys to select the 'Continue' or 'Retake Quiz' buttons in the dynamic window. 

Thanks to share your reply. 

[Velayutham23207238m26x]

Hi Team, 

It's could be great help if you are able to reply back to my query. 

Thanks