Online HelpPC 2.10      Quick Reference Utility     Copyright 1991 David Jurgens

 
                            int dup( int handle )                            
                                                                                
                                                                                
        - prototype in io.h                                                     
                                                                                
        - returns a new file handle that duplicates the old handle              
        - returns -1 on error                                                   
                                                                                
                                                                                
 

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