Rockwell Automation 1747-PCINT API Software for 1746 I/O - Manual (Page 99)

OC_GetVersionInfo Library of Routines 6–45
Publication 1747-6.5.3 June 1998
Example:
HANDLE Handle;
OCVERSIONINFO verinfo;
int retcode;
retcode = OC_GetVersionInfo( Handle, &verinfo );