wrirting data to fixed length flat file

hi,

I WROTE A WINDOWS APPLICATION WHICH WRITES DATA FROM EXCEL FILE TO A TEXT FILE WITH COLOUMNS OF FIXED LENGTH SUPPOSE IF THE LENGTH OF THE COLOUMN IS 20 CHARACTERS AND THE VALUE IN THE COLOUMN IS ONLY 10 CHARACTERS
THE RMAINING 10 CHARACTERS WILL BE EMPTY SPACES.

THE PROBLEN IS THAT IN TEXT FILE IT ACCEPTS ONLY 1024 CHARACTERS PER LINE. BUT I HAVE 3036 CHARACTERS .

PLEASE HELP ME WITH AN ALTERNATIVE TO SOLVE THE PROBLEM.

tHANKS IN ADVANCE.