I'm creating a data-driven help system much like the one used in Foxpro (yes, there are reasons I'm not using HTML or the actual Foxpro help itself). I am populating an array used to determine the order of topics visited. The array is one-dimensional containing a HelpContextID number. I also store the last row number in a form property in order to determine where I am in the array; movement is Back (-1) or Forward (+1) in relation to that row number and I'm trapping for when I'm on the first and last row. My question is regarding what logic I should use to get the best naviagational result. Below are three examples of the array, each using different logic:

A. Every topic visited is added to the array

1
5
1
2
4
1

B. Only topics not already visited are added to the array

1
5
2
4

C. Every topic is added to the array, but the previous matching one is removed

1 (removed)
5
1 (removed)
2
4
1

...resulting in

5
2
4
1

The last one (C) seems to be the best to me as it only takes into consideration the most recent navigation, but I wanted to know what others thought and if there was another scenerio that I haven't thought of yet. Thanks!

Regards, Renoir