Writing a programme in MS-DOS?

I have a table in Excel spreadsheet which is containing data to motor through a stepper driver I can convert this spreadsheet by save as CSV file, the problem I have know is to write a programme in MS DOS through windows to send this CSV file to the serial port and wait for the feedback from the stepper driver to come back and then another 4 piece of stream data because the stepper driver does not have hand shacking, can you please help me how to write this programme in MS DOS?