USB-8451 header file is missing function definitions to Get and Set Polling Timeout on I2C bus

Not sure where to post this.  There doesn't seem to be an I2C board. 

I'm using a NI USB-8451 device to write to an EEPROM.  It sometimes gives an error that suggests I increase the ACK Polling Timeout.  The manual describes a function calls to get and set the ACK timeout along with other functions that are not included in my header file.  What am I missing?

Thanks in advance,

Nick