Saving canvas with functions like script

Hi!
I tried to save canvas as *.C file. There were functions drown on canvas. Thif functions plot were not saved. Below is the part of a code:

TF1 *VE20p = new TF1("VE20p","",115.118,1151.18);

VE20p->SetFillColor(19);
VE20p->SetFillStyle(0);
VE20p->SetLineWidth(3);
VE20p->Draw("same");

This is for every function. But there are no formula and parameters. Why?

-- 
Dmitry A. Shtol                        (SND group)    
Budker Institute of Nuclear Physics