void test() {
 TFile *f = new TFile("hsimple.root","READ"); 
 TH2 *h;
 h = (TH2*)f->Get("hpxpy");
 TCanvas *c1 = new TCanvas("c1","c1",10,10,700,500);
 h ->Draw();
 cout << "The first cut..." <<endl;
 cut1=(TCutG*)gPad->WaitPrimitive("CUTG","CutG");  
 cut1->SetName("cut1");
 cout << "The second cut..."<< endl;;
 cut2=(TCutG*)gPad->WaitPrimitive("CUTG","CutG");  
 cut2->SetName("cut2");
 h->ProjectionX("a",-1,-1,"[cut1]");
 h->ProjectionX("b",-1,-1,"[cut2]");
 h->ProjectionX("c",-1,-1,"[cut1,cut2]");
 c->Draw();
 cout <<"d histogram have zero events :-(" <<endl;
}