• Identifier of the temporary file. This identifier will be used by all the functions for handling the external files.
• -1 if an error occurred. To find out the error details, use ErrorInfo associated with the errMessage constant.

Constants used to define the opening mode of the file, the access mode to the file and the lock mode of the file.

• Lock mode of the file and opening mode of the file:
  

  foWriteLock	The other applications cannot modify the current file. This constant is not available.
  foReadLock	The other applications cannot read the current file. This constant is not available.
  foWithoutDeletion	The file will not be automatically deleted when it is closed. Default value.
  foAutomaticDeletion	The file is locked when it is opened and it will be automatically deleted when it is closed (call to fClose or at the end of the application). If the file was opened by another application, it will be automatically deleted by the system when all the applications have closed the file. Default value. This constant is not available. If the file is used by another application when it is closed (call to fClose or at the end of the application), it will not be deleted.

• Access mode to the file. This type is used by fReadLine and fWriteLine to define the type of information to read and write in the external file:
  

  Versions 17 and later foAnsi New in version 17 foAnsi foAnsi	Ansi file. This constant is used to manage an Ansi file when the "Use Unicode strings at runtime" mode is enabled in the project configuration. Mode used by default: in the WINDEV and WEBDEV projects earlier than version 17. in the configurations of WINDEV and WEBDEV projects that use the "Use Ansi strings at runtime" mode from version 17.
  foUnicode	Unicode file. This constant is used to manage a Unicode file when the "Use Ansi strings at runtime" mode is enabled in the project configuration. Mode used by default: in the WINDEV Mobile projects regardless of the mode and version used. in the configurations of WINDEV and WEBDEV projects that use the "Use Unicode strings at runtime" mode from version 17. This constant is not available.

Prefix (3 letters) for the name of the temporary file. This parameter is used to prefix the name of the temporary file. Only the first three letters will be taken into account.

Versions 15 and later

This parameter can be in Ansi or Unicode format.

New in version 15

This parameter can be in Ansi or Unicode format.

This parameter can be in Ansi or Unicode format.

Full or relative directory of the temporary file (up to 260 characters). A UNC path can be used. This directory name may (or may not) end with the "\" character. This directory must exist. Otherwise, a WLanguage error occurs.

If this parameter is not specified, the default directory will be:

• the temporary directory of Windows (if this directory exists on the current computer),
• the current directory (if the temporary directory of Windows does not exist on the current computer).

Versions 15 and later

This parameter can be in Ansi or Unicode format.

New in version 15

This parameter can be in Ansi or Unicode format.

This parameter can be in Ansi or Unicode format.

Full directory of temporary file (up to 260 characters). This directory name may (or may not) end with the "\" character. This directory must exist. Otherwise, a WLanguage error occurs. If this parameter is not specified, the default directory will be the temporary directory of Windows.