SQL Reporting Services: Hiding/showing columns when user click on collapse/expand rows

Hello,

I am working on a requirement that allow me to show columns when a user clicks on "+" (expand a row), and hides the column when a user clicks on "-" collapse a row.

So for example, when all rows are collapsed, report looks like:

COL1      COL2      COL3      COL4

+ A             B           C             D

+ A2           B2         C2            D2

When a user click on A to expand the a row in the report, then report should look like

COL1        COL5          COL6       COL2         COL3        COL4

-  A                                                 B           C             D

                  A_2             A_3

                  A_3             A_4

                  A_5             A_6

+ A2                                                B2         C2            D2

Please note that COL5 and COL6 only shows up when a row expands.

Any help is appreciated if this is doable in SQL reporting services.

Thanks