Passing Array of Srings between Visual Basic and Labview dll

I have searched and searched for the correct way to pass an array of
strings between Visual Basic 6.0 and a Labview 7 dll. So far, I still
do not know how to pass the array. When I create the dll in LV, the
array of strings is presented as a string, not an array. I am familiar
with passing arrays of type double, but I really need to know how to
pass an array of strings. Any and all help is appreciated.
Bob

Hey Bob,
From what I understand, that can get kind of messy. You have to allocate the memory in VB in the format that LabVIEW expects (see the externalcode.h file in National Instruments\LabVIEW 7.0\cintools for details). Then pass a pointer to that location to LabVIEW. There are a couple of related examples online. They don't necessarily show how to pass an array of strings to VB, but they should show how to pass a string and an array. I hope this helps.
Using Microsoft Visual Basic to Call LabVIEW DLLs That Pass String Data Types
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B123AE0CB9B0111EE034080020E74861&p_...
Using Microsoft Visual Basic to Call LabVIEW DLLs That Pass Array Data Pointers
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3D9E556A4E034080020E74861&p_...
Regards,
Chris J

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> What kind of measurments do you want to do and what kind of requirements do you have?
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No thanks, there has to be a better way to get an answer to my
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Message Edited by altenbach on 09-02-2007 11:51 PM
LabVIEW Champion . Do more with less code and in less time .

Passing arrays through multiple PL/SQL procedures and functions

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Here is one simulation ->
satyaki>
satyaki>select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod
PL/SQL Release 10.2.0.3.0 - Production
CORE    10.2.0.3.0      Production
TNS for 32-bit Windows: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production
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2 /
Type created.
Elapsed: 00:00:07.10
satyaki>
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2                                        array_out OUT n_array)
3 IS
4 BEGIN
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6    FOR i IN 1..array_in.count
7    LOOP
8      array_out.extend;
9      array_out(i) := array_in(i) * 2;
10    END LOOP;
11 END Get_Array;
12 /
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Elapsed: 00:00:00.89
satyaki>
satyaki>
satyaki>Create or Replace Procedure Set_Array(myArray IN n_array)
2 is
3    i   number(10);
4    rec emp%rowtype;
5    w n_array:=n_array(1200,3200);
6    bucket n_array := n_array();
7 Begin
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9
10    for i in 1..myArray.count
11    loop
12      select *
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14      from emp
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21    end loop;
22 End Set_Array;
23 /
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satyaki>
satyaki>
satyaki>select * from emp;
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      7654 MARTIN     SALESMAN        7698 28-SEP-81       1250       1400         30
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      7782 CLARK      MANAGER         7839 09-JUN-81       4450                    10
      7788 SCOTT      ANALYST         7566 19-APR-87       3000                    20
      7839 KING       PRESIDENT            17-NOV-81       7000                    10
      7844 TURNER     SALESMAN        7698 08-SEP-81       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-87       1100                    20
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
      7900 JAMES      CLERK           7698 03-DEC-81        950                    30
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Elapsed: 00:00:00.28
satyaki>
satyaki>declare
2    v n_array:=n_array(9999,7777);
3 begin
4    Set_Array(v);
5 end;
6 /
Employee No:9999 Name:SATYAKI
Commission Sub Type: 2400
Commission Sub Type: 6400
Employee No:7777 Name:SOURAV
Commission Sub Type: 2400
Commission Sub Type: 6400
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.15
satyaki>
satyaki>Regards.
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This is really a user forum, I think you need a developer forum... maybe SDK?
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For i=1:inf, 4) Is this vector a valid one? inf = Inf which is different from 1/eps.
Y= X-1;
end
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National Instruments

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Message Edited by Marc A on 10-03-2007 03:56 PM
Attachments:
Example_BD.png ‏2 KB

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Hi!
I need to call a VB ActiveX DLL from LabVIEW. When I run my LabVIEW code, I always meet an error as:
Error 1 occurred at Incorrect Function in T06.vi
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For I = 1 To 31
Set MyInputData(I) = New EM_nkd_DataPoint
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~~~
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TX
Attachments:
T07.vi ‏166 KB

Hi,
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^N wrote:
LabVIEW has array length = n
Matlab has array length -1 = N.
Could part o the confusion be due to the fact that LabVIEW arrays start with index zero and matlab arrays start with index one?
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LabVIEW Champion . Do more with less code and in less time .

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Passing Array of Srings between Visual Basic and Labview dll

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