Convert MHTML To XLSM Online for Free. Free Online MHTML To XLSM Converter. C++ MHTML To XLSM. MHTML To XLSM via C++....Conversion DOCX JPG PDF XML XLSX XLSM Convert MHTML to XLSM via...Factory::CreateIWorkbook(new String( "Input.xlsx" )); wkb->Save(new String( "Output...