How to set up an "Open Recent" menu in wxWidgets

wxFileHistory.cpp

#include "wx/wx.h"
#include "wx/filename.h"
#include "wx/filehistory.h"
#include "wx/config.h"

#define APP_NAME wxString("File History Example")

class MyApp: public wxApp
{
	virtual bool OnInit();
};

enum
{
	ID_Quit = 1,
	ID_FileOpen,
	ID_FileOpenRecent,
	ID_About,
};

class wxFileHistory;

class MyFrame: public wxFrame
{
public:
	MyFrame(const wxString& title, 
		const wxPoint& pos, const wxSize& size);

	void OnQuit(wxCommandEvent& event);
	void OnAbout(wxCommandEvent& event);
	void OnOpen(wxCommandEvent& event);
	void OnMRUFile(wxCommandEvent& event);

	void OpenFile(wxString filename);

private:
	wxFileHistory* mFileHistory;
	wxConfig* mConfig;

	DECLARE_EVENT_TABLE()
};


BEGIN_EVENT_TABLE(MyFrame, wxFrame)
	EVT_MENU(ID_Quit, MyFrame::OnQuit)
	EVT_MENU(ID_FileOpen, MyFrame::OnOpen)
	EVT_MENU(ID_About, MyFrame::OnAbout)
	EVT_MENU_RANGE(wxID_FILE1, wxID_FILE9, MyFrame::OnMRUFile)
END_EVENT_TABLE()

IMPLEMENT_APP(MyApp)


bool MyApp::OnInit()
{
	MyFrame *frame = new MyFrame(APP_NAME, wxPoint(50,50), wxSize(450,340));
	frame->Show(TRUE);
	SetTopWindow(frame);
	return TRUE;
}

MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
: wxFrame((wxFrame *)NULL, -1, title, pos, size)
{
	mConfig = new wxConfig(title);

	SetMinSize(size);

	wxMenu* menuHelp = new wxMenu;
	menuHelp->Append( ID_About, "&About..." );

	wxMenu *menuFile = new wxMenu;
	menuFile->Append(ID_FileOpen, "&Open");
	wxMenu* menuRecent = new wxMenu;
	menuFile->AppendSubMenu(menuRecent, "Open Recent");
	menuFile->AppendSeparator();
	menuFile->Append( ID_Quit, "E&xit" );

	wxMenuBar *menuBar = new wxMenuBar;
	menuBar->Append(menuFile, "&File" );
	menuBar->Append(menuHelp, "&Help");

	SetMenuBar(menuBar);

	mFileHistory = new wxFileHistory(10);
	mFileHistory->UseMenu(menuRecent);
	mFileHistory->AddFilesToMenu(menuRecent);
	mFileHistory->Load(*mConfig);
}

void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
	mFileHistory->Save(*mConfig);
	delete mConfig;

	delete mFileHistory;
	Close(TRUE);
}

void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
	wxMessageBox("Copyright (c) 2012 Mike Jones\naudioprogrammermike@gmail.com", APP_NAME, wxOK | wxICON_INFORMATION, this);
}

void MyFrame::OnOpen(wxCommandEvent& event)
{
	wxFileDialog* OpenDialog = new wxFileDialog(
		this, _("Choose a file to open"), wxEmptyString, wxEmptyString, 
		_("All Files (*.*)|*.*"),
		wxFD_OPEN, wxDefaultPosition);

	if (OpenDialog->ShowModal() == wxID_OK) // if the user click "Open" instead of "Cancel"
	{
		wxString CurrentDocPath = OpenDialog->GetPath();
		OpenFile(CurrentDocPath);
	}

	// Clean up after ourselves
	OpenDialog->Destroy();
}

void MyFrame::OpenFile(wxString path)
{
	wxFileName filename(path);
	
	SetTitle(APP_NAME << wxString(" - ") << filename.GetFullName()); // Set the Title to reflect the file open
	mFileHistory->AddFileToHistory(path);
}

void MyFrame::OnMRUFile(wxCommandEvent& event)
{
	wxString f(mFileHistory->GetHistoryFile(event.GetId() - wxID_FILE1));
	if (!f.empty())
		OpenFile(f);
}