Drawing directly to file

I am using the following segment of code to make a plot go directly to a file.

TCanvas *Hobbes = new TCanvas("Dist","A test",5,5,1200,600);
Hobbes->SetGrid();
Hobbes->cd();
TGraph *TG_Temperature = new TGraph(10);
TG_Temperature->SetMarkerStyle(6);
TG_Temperature->SetTitle("Temperature");

TG_Temperature->Draw("AP");
Hobbes->SaveAs("temperature.gif");

which works quite well. However I get the following messages on the command
line.
Info in TCanvas::Print: gif file temperature.gif has been created

Is there a way to suppress these?

Chris

gErrorIgnoreLevel = kWarning;orgErrorIgnoreLevel = kInfo;See $ROOTSYS/include/TError.h for details