Exports a document to the specified file path in MHT format.
A String which specifies the file name (including the full path) for the created MHT file.
Once the document export has started, it will run until the resulting document is complete and cannot be interrupted or canceled in the process.
Use this method to export a document to an MHT file using its current MHT-specific export options.
This method overwrites any files present at the specified path that have the same file name without any warnings.
For more, see Export to MHT.