Unfortunately, it's pretty complicated and my previous explanation is the best I can do here. I wrote about it in the book and gave example code and it took over four pages to do so. Obviously, it's not feasible to retype four pages in a forum post.  You need to use the functions I listed in the previous answer to get the current value and populate that in an array as the cross-tab prints.

Everything I mentioned earlier is CR based. Nothing refers to .NET code. You would put those function in the conditional formatting formula of the crosstab cell. That way, as the crosstab prints you can call the GridRowColumnValue() function to find out which cell is being printed. Then use that info to store the data in the proper array index.

We have two different conversations going on right now. This is a CR XI topic only. Thus, you give it any datasource you want and it populates the crosstab and you can grab the current data or overwrite it. The other post you have refers to .NET. In that case, you build a manual dataset in your code and use that dataset as your datasource for the report. Then you print the crosstab object using that dataset.

I just want to make sure that we are either having one conversation or if its two, then we stay clear on what they are about.