Online HelpPC 2.10      Quick Reference Utility     Copyright 1991 David Jurgens

 
                          int isatty( int handle )                          
                                                                                
                                                                                
        - prototype in io.h                                                     
                                                                                
        - if handle is associated with a character device like tty,             
          console, printer, or serial port returns a non-zero integer           
          otherwise returns zero                                                
                                                                                
                                                                                
 

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