Agilent 4155C/4156C VXIplug&play Driver User’s Guide, Edition 4 2-59
Driver Function Reference
hpe5250a_cmdReal64Arr_Q
Syntax ViStatus _VI_FUNC hpe5250a_cmdReal(ViSession vi, ViString cmd_str, 
ViReal64 value);
Parameters vi  Instrument handle returned from hpe5250a_init( ).
cmd_str  Instrument command (cannot exceed 256 bytes in length).
value  Parameter for command. -1E+300 to 1E+300.
hpe5250a_cmdReal64Arr_Q
This function passes the cmd_str string to the instrument. This command expects a 
response that is a definite arbitrary block of 64 bit real. You specify the cmd_str and 
size parameters, and get result[ ] and count.
Syntax ViStatus _VI_FUNC hpe5250a_cmdReal64Arr_Q(ViSession vi, ViString cmd_str, 
ViInt32 size, ViReal64 _VI_FAR result[ ], ViPInt32 count);
Parameters vi  Instrument handle returned from hpe5250a_init( ).
cmd_str  Instrument command (cannot exceed 256 bytes in length).
size  Size of result[ ] (number of items in the array). 
1 to 2147483647.
result[ ]  Response from instrument.
count  Count of valid items in result[ ].
hpe5250a_cmdReal64_Q
This function passes the cmd_str string to the instrument. This command expects a 
response that can be returned as a 64 bit real.
Syntax ViStatus _VI_FUNC hpe5250a_cmdReal64_Q(ViSession vi, ViString cmd_str, 
ViPReal64 result);
Parameters vi  Instrument handle returned from hpe5250a_init( ).
cmd_str  Instrument command (cannot exceed 256 bytes in length).
result  Response from instrument.