I have a requirement to have a report drill down to detail data with a "+" sign within the same window.  So instead of drilling like Crystal does, in a new window, I need to just expand to show the detail right below the summary info.

+ Group line
- Group line
    Detail line
    Detail line
+ Group line
- Group line
    Detail line

The +/- would be interactive, with the user clicking on it to expand/collapse the subsuquent detail section.

Any suggestions?

This is something that Reporting Services does.  I need help, I don't want to go to RS.

CRXIr2 in .NET WinForms