These are not actually IVI calls. When the call begins with the instrument name (HP662XA) it is likely making a call to the .c file of the instrumetn driver. Inside of the instrument call are IVI compliant calls that are made to the instrument. You can see this in the .c file of your driver:
C:\MeasurementStudio\cvi\instr\hp662xa.c
This is the path with a typical install of the driver, yours should be similar.
Chris D
Applications Engineer
National Instruments
