AssocQueryString

Displaying the associated icons and descriptions for files and folders

Drawing standard Windows icons

Finding the application, icon and friendly names associated with a file name

How to find the application associated with a file name

How to obtain Content-Type value for a file type from the System Registry

How to view icons stored in executable files (Icon Viewer) - II

How to view system icons for the classes installed on the local machine

System Image List Viewer

Windows Shell Icons displayed and exported to ICO files (Vista)