#include <wx/wx.h>

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

wxIMPLEMENT_APP(MyApp);

bool MyApp::OnInit()
{
   wxFileDialog * dialog = new wxFileDialog(NULL, _("Title"), wxEmptyString, wxEmptyString, _("All Files (*.*)|*.*"), wxFD_OPEN|wxFD_FILE_MUST_EXIST);
   dialog->ShowModal();
   dialog->Destroy();
   return false;
}