Registering a File Viewer
This section shows how to register a hypothetical file viewer for "AcmeWord Document" files with the .AWD filename extension. The file viewer is implemented in an in-process server DLL called ACMEWRDV.DLL. The DLL has this class identifier: 00021116-0000-0000-C000-000000000046. The program that installs the file viewer creates the following registry entries. HKEY_CLASSES_ROOT \QuickView \.AWD = AcmeWord Document \{00021117-0000-0000-C000-000000000046} = AcmeWord DocumentViewer \CLSID \{00021117-0000-0000-C000-000000000046} = AcmeWord Document
Viewer \InprocServer32 = c:\acmeword\acmewrdv.dll = ThreadingModel = "Apartment" The .REG file, which is an ASCII text file, contains these entries. (Note that wrapped lines are indented on the second line.) HKEY_CLASSES_ROOT\QuickView\.AWD = AcmeWord Document HKEY_CLASSES_ROOT\QuickView\.AWD \{00021117-0000-0000-C000-
000000000046} = AcmeWord Document Viewer HKEY_CLASSES_ROOT\CLSID\{00021117-0000-0000-C000-000000000046} =
AcmeWord Document Viewer HKEY_CLASSES_ROOT\CLSID\{00021117-0000-0000-C000-000000000046}
\InprocServer32 = c:\acmeword\acmewrdv.dll = ThreadingModel = "Apartment" The Quick View program uses these registry entries to associate a path with the class identifier of a file viewer's in-process server DLL.
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