To view a PDF document.

// define pointer for view controller
std::auto_ptr<PDF::PDFViewCtrl> view;

// create a view controller,
// passing in the platform specific window handle and the current HINSTANCE for windows
view = std::auto_ptr<pdftron::PDF::PDFViewCtrl>(new pdftron::PDF::PDFViewCtrl(parent_hwnd, hinstance));

// create a doc instance
std::auto_ptr<PDF::PDFDoc> doc(new PDF::PDFDoc(filename));

// set doc to the view
view->SetDoc(*doc);

PDF Viewer Control (Simple) sample
Full source code which shows how to use PDF viewer control in a basic project. The sample uses a number of built-in features from PDFViewCtrl to implement document navigation, text highlighting, markup, and editing.

The PDFTron SDK comes with a powerful high level class called PDFViewCtrl that allows users to easily display PDF documents in their application. This class wraps around all the document processing lower level details that are required when displaying a PDF document.