![]() ![]() ![]() ![]() Leave the default value of the ProgID empty, in which case the system uses the.Specify a unique value for the file type description of each file type ProgID by doing one of the following: It is important to avoid doing so in cases where it might have been changed by another application and you thus cannot easily remove the value. Leaving file type mappings unchanged avoids the need to have conditional code that only removes the file type mapping if the value still points to your ProgID. Doing so works because file type mappings are stored per user in HKEY_CLASSES_ROOT\.ext, and the system identifies the case where the ProgID value is missing and ignores it. Leave the file type mappings unchanged at uninstall time. Remove the ProgID values when you install and uninstall your program. HKEY_CLASSES_ROOT\ App.jpeg (your ProgID).Note that some file types have multiple extensions that point to the same ProgID for example: To create a ProgID for each unique file type that your application handles, use these steps. If you plan to associate one or more file types with a new application, you must define a ProgID for each file type that you want to associate with the application. ![]()
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