What kind of variable / advanced action would I need to do this?

Question

Captivate 8.
I have a menu slide (of sorts) to allow users to choose which of four topics they want to explore first. It has 4 graphics with click boxes. Each click box jumps to a specific slide and the the user progresses through that section. At the end of that section, the user is automatically brought back to the menu slide, where they could then choose their next topic.
I want them to be required to complete all four topics (in any order).
When they have completed all four topics and are bounced back to the menu slide for the fourth and final time, I would like that slide to then have a button on it that they would click to move to the conclusion slides for the module.
Thanks advance for the shove in the right direction.

Answer 1

Another time, why is Search in this forum not working as it should. Have posted same answer at least 10 times.
Have a look at: Captivate 8 - First Adventures - Captivate blog   where I use shared actions to create such a dashboard.
First tip: you don't need a click box + graphic, because you can use a shape button filled with that graphic:, see Turn an Image into a Button - Captivate blog
You need to create as many user variables as you have topics: v_one, v_two, .... with a default value of 0. They will be toggled to 1  in the actions.
For each shape button (or click box if you really want to use two objects instead of one) you'll need a conditional advanced action with two decisions. I will label the button that has to appear after each topic has been visited at least once, Bt_Next. It is initially hidden.
First decision of the advanced or shared action is a mimicked Standard action:
'Always'
IF 1 is equal to 1
   Assign v_one with 1   for the first topic, for a shared action v_one will become a parameter
   Jump to .... slide_11     slide to jump to, will be another parameter
Second decision will check the value of the variables, and show the Next button if they have all the value 1
'Checker'
IF v_one is equal to 1  AND
    v_two is equal to 1 AND...
Show Bt_Next
BTW, long time ago I published this solution (with advanced actions) with a more detailed explanation: Template for reusing script? - Captivate blog
Now it is no longer necessary to create a template to reuse advanced actions, you just create shared actions.