OpenFileDialog Component (Windows Forms)
How to: Open Files Using the OpenFileDialog Component
Explains how to open a file at run time via an instance of the OpenFileDialog component.
Dialog-Box Controls and Components
Describes a set of controls and components that allow users to perform standard interactions with the application or system.
Controls to Use on Windows Forms
Provides a complete list of Windows Forms controls, with links to information on their use.
Essential Code for Windows Forms Dialog Boxes
Discusses the Windows Forms dialog box controls and components and the code necessary for executing their basic functions. (MSDN Online Library technical article)