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  Include:   <string.h>
 
  Syntax:    size_t strspn( char *string1, char *string2 );
             size_t _fstrspn( char _far *string1, char _far *string2 );
 
  Returns:   the position of the first nonmatching character in
             <string1>.
 
  See also:  strcspn, strncat, strncmp, strncpy, strnicmp, strrchr
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