# File Extraction API Functions

This section describes the functions in the File Extraction API. The File Extraction functions open a container file, and extract the container’s subfiles so that the subfiles are exposed and available for conversion. Subfiles can be files within a Zip archive, messages in a mail store, attachments in a mail message, or OLE objects embedded in a compound document.

Each function appears as a function prototype followed by a description of its arguments, its return value, and a discussion of its use.

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