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An application performs one of the following to write a log entry in a SetupAPI text log:
Calls SetupWriteTextLog to write a single text log entry that contains information about an installation event.
Calls SetupWriteTextLogError to write information about a SetupAPI-specific error or a Win32 error to a text log. SetupWriteTextLogError writes two consecutive entries to a text log: the first entry contains the same information in the same format as that written by SetupWriteTextLog and the second entry logs a corresponding error code and a user-friendly description of the error.
Calls SetupWriteTextLogInfLine to write a single text log entry that contains the text of a specified INF file line.
As described in Format of a Text Log Section Body, the SetupAPI logging functions write entries in the following format:
entry_prefix time_stamp event_category indentation formatted_message
The main difference between the entries that the various SetupAPI logging functions write to a text log is in the specific information content and in the format of the formatted-message field.
For information about how to set the indentation field to indent the formatted-message field, see Writing Indented Log Entries.