void hlHisto4()
{
TCanvas *c1 = new TCanvas("c1", "", 0, 0, 600, 400);
TF1 *f1 = new TF1("f1", "x*gaus(0) + [3]*abs(sin(x)/x)", -50.0, 50.0);
f1->SetParameters(20.0, 4.0, 1.0, 20.0);
TH1F *h1 = new TH1F("h1", "Test random numbers", 200, -50.0, 50.0);
h1->FillRandom("f1", 100000);
h1->Draw();
h1->Fit(f1, "Q");
gStyle->SetGridColor(kGray);
c1->SetGrid();
TText *info = new TText(0.0, h1->GetMaximum()*0.7, "please move the mouse over the frame");
info->SetTextSize(0.04);
info->SetTextAlign(22);
info->SetTextColor(kRed-1);
info->SetBit(kCannotPick);
info->Draw();
c1->Update();
h1->SetHighlight();
c1->HighlightConnect("HighlightZoom(TVirtualPad*,TObject*,Int_t,Int_t)");
}
