[ROOT] read object owned by histogram

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Hi,
First happy new year to everbody.
I shall start this new year with a root question.

I have a file in which I have a histogram. This histogram has been saved 
with its fit. I would like to access the fit in order to read the 
parameters. So far I have:
TFile f("data/root/run5345.root");
TH1F *myhisto =(TH1F*)f->Get(Form("boundary;1"); //I have several of them
So from here I have a pointer to boudary;1
inside it there is "boundary" (the histogram) and "gaus" (the fit)
no problem to retrieve the parameters of the histogram directly like 
that:
Double_t mean=myhisto->GetMean();
But How to I get the fit parameters ?

Cheers

 -- 
------------------------------------------------------------
 Reinhardt CHAMONAL            The University of Edinburgh  
                               School of Physics 
 email: chamonal@ph.ed.ac.uk   King's Buildings, JCMB, 5301 
                               Mayfield Road                
 phone: +44-131-650 5307       Edinburgh, EH9 3JZ           
 
 web: http://www.ph.ed.ac.uk/~chamonal/
      http://www.reuh.fr.st
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