// Test demonstrating problem with TStyle:
TCanvas *canvas = new TCanvas("canvas", "Test of TStyle", 800,600);

TH1F *h1 = new TH1F("h1", "Test Histogram", 100, -10, 10);
TStyle *mystyle = new TStyle();
void test1()
{
  h1->FillRandom("gaus", 200);
  h1->GetXaxis()->SetTitle("X title");
  h1->GetYaxis()->SetTitle("Y title");

  // style manipulation:
  mystyle->Copy(*gStyle);         // creating a copy of default style
  mystyle->SetFillColor(10);
  mystyle->SetTitleFillColor(5);
  mystyle->SetStatColor(10);
  mystyle->SetLabelSize(0.07, "XY");
  mystyle->SetLabelOffset(0.01,"XY");
  mystyle->SetTitleSize(0.08, "XY");
  mystyle->SetPadLeftMargin(0.2);
  mystyle->SetPadBottomMargin(0.2);
  mystyle->SetHistFillColor(2);
  mystyle->SetHistLineWidth(3);
  mystyle->cd();
  gROOT->ForceStyle();
  gROOT->UseCurrentStyle();
  
 
  h1->Draw();
  canvas->Update();
}