how to viwrite() and viread() commands in vb?

[flockman]

we use VISA32.dll and rsfsh_32.dll communication with FSH

after excutting the following program:

........

     status = rsfsh_setCenterFrequency(g_hrsfsh, freqcenter)
      Call ErrHan(status)
    status = rsfsh_setFrequencySpan(g_hrsfsh, freqspan) 

    Call ErrHan(status)
.......

we can get sequene codes with Ni SPY:

...
24.  viQueryf (ASRL4 (0x01E8C7B8), "%s", "%ld")

0 (VI_SUCCESS)

25.  Formatted viWrite (ASRL4 (0x01E8C7B8), "SET", 3, 3)
0 (VI_SUCCESS)

26.  Formatted viRead (ASRL4 (0x01E8C7B8), "0.", 4000, 2)
0 (VI_SUCCESS)

27.  viQueryf (ASRL4 (0x01E8C7B8), "%s", "%ld")
0 (VI_SUCCESS)

28.  Formatted viWrite (ASRL4 (0x01E8C7B8), "FREQ,930000000.000000", 21, 21)
0 (VI_SUCCESS)

29.  Formatted viRead (ASRL4 (0x01E8C7B8), "0.", 4000, 2)
0 (VI_SUCCESS)

30.  viQueryf (ASRL4 (0x01E8C7B8), "%s", "%ld")
0 (VI_SUCCESS)

31.  Formatted viWrite (ASRL4 (0x01E8C7B8), "SET", 3, 3)
0 (VI_SUCCESS)

32.  Formatted viRead (ASRL4 (0x01E8C7B8), "0.", 4000, 2)
0 (VI_SUCCESS)

33.  viQueryf (ASRL4 (0x01E8C7B8), "%s", "%ld")
0 (VI_SUCCESS)

34.  Formatted viWrite (ASRL4 (0x01E8C7B8), "SPAN,60000000.000000", 20, 20)
0 (VI_SUCCESS)

35.  Formatted viRead (ASRL4 (0x01E8C7B8), "0.", 4000, 2)
0 (VI_SUCCESS)

...

all is ok!

but if we want to rewrite the program with VB, How can we do ?

there is not viQueryf function  in VB. ViQueryf is only C function.

Could somebody help us? Could you give us some instance program?

TIA!

[NA1]

I think you need to use commands like "~~" and "!!"...

[smercurio_fc]

---

@NA1 wrote:

I think you need to use commands like "~~" and "!!"...

---

For original question: viQueryf is just a combination of viPrintf and viScanf. Unfortunately, those functions are also not supported in VB. What you have to do is to change the code so that you use viWrite and viRead and do your formatting and parsing separately using standard VB functions.

[LiYi]

Please try as the what the below thread said:

http://forums.ni.com/t5/Instrument-Control-GPIB-Serial/viOpen-is-not-defined-in-my-VBA-code/m-p/1093...