wxPreviewFrame *frame = new wxPreviewFrame(preview, this, "Demo Print Preview", 100, 100, 600, 650);
frame->Centre(wxBOTH);
frame->Initialize();
wxPreviewFrame *frame = new wxPreviewFrame(preview, this, "Demo Print Preview", 100, 100, 600, 650);
frame->Centre(wxBOTH);
frame->Initialize();