// Create a new workbook Workbook workbook = new Workbook(); IWorksheet worksheet = workbook.getWorksheets().get(0); // Prepare data final String CorrectWord = "Macro"; worksheet.getRange("A1:D5").setValue(CorrectWord); final String MisspelledWord = "marco"; worksheet.getRange("A2,C3,D1").setValue(MisspelledWord); // Find the first misspelled word IRange searchRange = worksheet.getRange("A1:D5"); IRange firstMisspelled = searchRange.find(MisspelledWord); // Mark it with red foreground firstMisspelled.getFont().setColor(Color.GetRed()); // Save to an excel file workbook.save("FindBasicUsage.xlsx");