How to refer to a control on a subreport?

[Gkirkup]

I have a report with several subreports. I need to total the subreports onto the main report. How do I refer to the control on the subreport?
I know that with a form / subform I would use:
Me!Subform1.Form!Controlname
But simply replacing 'Form' with 'Report' doesn't seem to work.

Robert

 

[Mihail]

Also, will not be possible to do this because, as far as I know, the controls don't store the values.
Just display this values.

The approach is to create a new calculation as control source for the textbox.