![]() For more information, see File Type Handlers. myp-file to be opened with an application called MyProgram, use the following syntax: HKEY_CLASSES_ROOTĪs demonstrated in the preceding example, if you also register a short file name extension (.myp), you should create a subkey for the long extension (.myp-file) as well. For example, if you want a file type with the short extension. It is important to include the leading period (.) when creating file type subkeys in the registry. File name extension subkeys are stored in the HKEY_CLASSES_ROOT subtree. For information about defining a new ProgID, see Programmatic Identifiers.įile name extension subkeys have the following general form: extension= ProgID. To associate the file type with a new application, define a ProgID for your application. To associate the file type with an existing application, locate the application ProgID in the registry. The distinction is relevant only in making decisions about your choice of file type registration. #Change default app for file type windowsWindows does not differentiate between public and private file types. Some file types can start as private file types but later become public file types. As a result, private file types are typically not prone to conflicts between applications. Unlike public file types, private or proprietary file types typically have a format that is implemented and understood by only one application or vendor. Some examples of file types that are considered public are the image file types. Applications from multiple vendors are likely to handle them.They need to be supported on many different platforms.They are often exchanged between computers and users for diverse purposes.They are typically defined by standards bodies, and/or are promoted by their defining organizations as interchange formats.Characteristics of public file types include: Public file types are also known as popular or contentious types because competing applications might want to be associated with these file types. #Change default app for file type how to
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