Calling a DLL from XI

Hi,
We have an external system which is used to validate bank account numbers. To be able to use this functionality via XI a DLL needs to be called.
Is this possible via XI using Java perhaps.
Thanks
Martin

I see several ways:
1. to develop COM proxy for ddl and create COM Adapter. (As far I know there is no COM Adapters for XI) Maybe there is JCA Connector that could be used for XI.
2. to use XI Java Proxy that will call a dll through JNI. DDL must be part of java application.

Similar Messages

Calling external dll from oracle 8i pl/sql

Hi
I am facing in calling extrenal dll from pl/sql.
Steps followed by me are
1.
create library crc_lib as
'D:\ORACLE\ORA81\RDBMS\EXTPROC\EXTPROC\my.DLL';
2.
CREATE OR REPLACE FUNCTION check_file_crc (f1 char)
RETURN BOOLEAN AS
EXTERNAL LIBRARY CRC_LIB
NAME "Check_File_CRC"
LANGUAGE C;
3. CREATE OR REPLACE PROCEDURE CRC_TEST (f1 varchar2) AS
     RetValue varchar2(100);
BEGIN
     if check_file_crc(f1) then
          RetValue := '0';
     else
          RetValue := '1';
     end if;
     DBMS_OUTPUT.PUT_LINE(RetValue);
EXCEPTION
     when others then
     DBMS_OUTPUT.PUT_LINE(sqlerrm|| 'I am in exception');
END;
4.ET SERVEROUTPUT ON
SQL> exec crc_test('C:\file.txt');
ORA-28576: lost RPC connection to external procedure agent
I am in exception
I have tsnames.ora as
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
and listner.ora as
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\Oracle\ora81)
(PROGRAM = extproc)
I am unable to resolve problem please help.
Prashant
Edited by: prashant13 on Jul 23, 2009 11:27 AM

See if MOS note      468404.1 proves helpful here (though not meant for your version of Oracle).

Calling LV DLL from VB

I have a vi that initializes, measures, and releases
an OSA instrument. I want to call this routine from VB.
I used Standard calling convention when making DLL from LV.
Here is my VB declaration:
Private Declare Sub OSAMeasurement Lib "C:\ADE\OSAMeasurement.dll" Alias "OSADFBMeasurement" _
(ByVal GPIB As Long, _
ByVal Serial_Number As String, _
ByVal FileName As String, _
ByVal File_Path As String, _
ByVal Start_Wavelength_nm As Double, _
ByVal Stop_Wavelength_nm As Double, _
ByVal Level_Scale_dB As Double, _
ByVal Res_nm As Double, _
ByVal Peak_Wavelength As Double, _
ByVal Peak_Level As Double, _
ByVal SMSR As Double, _
ByVal FWHM As Double, _
ByVal Mode_Offset As Double, _
ByRef Level_Array() As Double, _
ByRef Wa
velength_Array() As Double, _
ByVal Array_Length As Long)
Here is my VB call:
Call OSAMeasurement(Form1.OSA.PrimaryAddress, _
(strOXM & Form1!txtOPMNumber), _
(CStr(CInt(dblSetVoltage)) & "v_Scan.txt"), _
(txtDataStoragePath & strOXM & " " & Form1!txtOPMNumber & "\"), _
1520, 1620, 5, 1, Peak_Wavelength, Peak_Level, _
SMSR, FWHM, Mode_Offset, _
Level_Array, Wavelength_Array, 1001)
I get RunTime Error "49"
Bad DLL calling convention
What is wrong?
Any suggestions/comments?
Attachments:
OSA.zip ‏703 KB

Basically what i want to do is to call the microchip's dll called "mpusbapi.dll" from VB6. This dll is written in C++. This dll has some basic functions of usb like MPUSBRead() , MPUSBWrite , MPUSBOpen() etc.
I have made a usb data acquisition card and i want to communicate with this card by means of VB 6. Please tell me or send a tutorial of calling a DLL from VB 6.
Any help greatly appreciated
Attachments:
_mpusbapi.cpp ‏42 KB
_mpusbapi.h ‏19 KB

Calling a dll from VB

Hi all
I have two questions
1) I know about the visual Basic 6 but what is measurement studio for visual Basic 6?
2) Can anyone tell me how to call a dll from Visual Basic 6? Any example for this ?
Any help greatly appreciated :-)

Basically what i want to do is to call the microchip's dll called "mpusbapi.dll" from VB6. This dll is written in C++. This dll has some basic functions of usb like MPUSBRead() , MPUSBWrite , MPUSBOpen() etc.
I have made a usb data acquisition card and i want to communicate with this card by means of VB 6. Please tell me or send a tutorial of calling a DLL from VB 6.
Any help greatly appreciated
Attachments:
_mpusbapi.cpp ‏42 KB
_mpusbapi.h ‏19 KB

How to call labview DLL from C#, passing char, char[], float[], long, short

Hi,
I'm having trouble calling labview dll from C# to perform certain function.
The function supposed to return the values in the float Analysis[] array. However, when I execute it it only returns zero values.
It seems that some parameters are not properly passed to the dll.
Below is the function in the header file:
void __stdcall Optical_Center(char FileDirectory[], long ImagePtr,
    short int Height, short int Width, char ReadFromFile, float Analysis[],
    long lenAnalysis);
and my corresponding dll import in c#:
[DllImport(@"SMIA.dll", CharSet = CharSet.Ansi)]
        public static extern void Optical_Center([MarshalAs(UnmanagedType.LPStr)]string FileDirectory, long ImagePtr,
            short Height, short Width,char ReadFromFile, IntPtr Analysis,
            long lenAnalysis);
string str = @"C:\SMIA.raw";
int len = 3;
long m_lenAnalysis = 3;
long m_ImagePtr = 0;
short m_Height = 2464;
short m_Width = 3280;
IntPtr m_PtrArray = Marshal.AllocHGlobal(len * Marshal.SizeOf(typeof(float)));
char m_ReadFromFile = '1';
Optical_Center(str,m_ImagePtr,m_Height,m_Width,m_ReadFromFile,m_PtrArray,m_lenAnalysis);
float[] m_Analysis = new float[len];
Marshal.Copy(m_PtrArray, floatArray,0,len);
Marshal.FreeHGlobal(m_PtrArray);
string printstr = "";
for (int i=0; i<len; i++)
    printstr = printstr + floatArray[i].ToString() + "\n";
MessageBox.Show(printstr);
Appreciate if anyone can help, thanks.
KL

I was just about to post the header file of the DLL, when
I noticed that there's a function called LVDLLStatus.
This little thingie turned out to be a rather handy tool.
With that function I found that in the DLL I had a problem
with another function that prevented the DLL to be correctly
loaded.
This other function in the DLL is for generating digital output
and it worked as it should, when tested from LV.
Anyway if someone is interested, I got it working by using
the LoadLibrary and GetProcAddress function, as in the
source code thatI posted earlier.
I will investigate what is wrong with that digital output, and
post into a another thread if I have problems with that.

How to call LabVIEW dll from ATL COM dll

I have tried to call simple LabVIEW 8.6 Dll from win32 test application, class Library.
I have include LabVIEW generated SharedLib.h file and SharedLib.lib file in the test application which I created as simple win32 console project and also from win32 class Library. I was sucessfully able to call my LabVIEW dll funtion.
But when I create ATL COM project and try to add SharedLib.h file and SharedLib.lib file I used to get following erors
Error 1 error C2733: second C linkage of overloaded function 'StrCatW' not allowed d:\program files\national instruments\labview 8.6\cintools\extcode.h 463
Error 2 error C2733: second C linkage of overloaded function 'StrCpyW' not allowed d:\program files\national instruments\labview 8.6\cintools\extcode.h 464
Error 3 error C2733: second C linkage of overloaded function 'StrCpyNW' not allowed d:\program files\national instruments\labview 8.6\cintools\extcode.h 465
Error 4 error C2733: second C linkage of overloaded function 'StrCmpW' not allowed d:\program files\national instruments\labview 8.6\cintools\extcode.h 466
Error 5 error C2733: second C linkage of overloaded function 'StrCmpNW' not allowed d:\program files\national instruments\labview 8.6\cintools\extcode.h 467
these many errors.
Will some one explain me how to call LabVIEW dll from ATL COM dll.
Thanks & Regards,
Jay

I also had this problem. My application is unicode-aware, but I was attempting to link it to a library with primitive C-string arguments. You could dynamically load the DLL as suggested (more work), modify the header files (really not recommended), or if you are feeling lucky you could try fooling the compiler, as I was successfully able to do in Visual Studio 2010, by steering the preprocessor around those functions (assuming you're not using them, of course -- otherwise this probably wouldn't work):
// prepare for NI extcode.h inclusion. avoid linker errors for this project.
#define StrCatW(a,b)     IgnoreLinkError_StrCatW(a,b);
#define StrCpyW(a,b)     IgnoreLinkError_StrCpyW(a,b);
#define StrCpyNW(a,b,c) IgnoreLinkError_StrCpyNW(a,b,c);
#define StrCmpW(a,b)     IgnoreLinkError_StrCmpW(a,b);
#define StrCmpNW(a,b,c) IgnoreLinkError_StrCmpNW(a,b,c);
// header file for my LabView-built DLL (ASCII single-byte character arguments)
#include <MyLibraryHeader.h>
// clean up afterwards, put things back to 'normal'
#undef StrCatW
#undef StrCpyW
#undef StrCpyNW
#undef StrCmpW
#undef StrCmpNW

Security exception when trying to call a DLL from an applet

Hi all,
I really hope someone out there can help me. I'm trying to call a windows DLL from an applet but always get some error when the call to the DLL comes. If I run it on the command line (calling a dummy main function that only calls the dll) I don't get any error. However, with the -Djava.security.manager, I get an ExceptionInitialiserError. When running it in a browser, I seem to get any of three errors, the above, securityAccessControlException (as I was expecting) and even NoClassDefFoundError.
I realise of course that this has to do with the permissions in effect but nothing seems to happen when I change the policy file, so I have to feeling that I'm chaning the wrong file. The one I'm using is the one the JRE entry in the registry is pointing to, Java Runtime Environment->CurrentVersion...
I even tried giving everything in the applet's directory AllPermission.
So what I'm wondering is this. Is there any way to check if your policies are actually working and when you update the files, what do you need to do to make the changes take effect?
Best regards,
G�sli

I have the same problem. Have you solved your problem, if so please let me know what the solution is.
Einar �rn

Calling a dll from a new menu item in Bridge. Idiot help needed

Hi,
I'm trying to what I believe is a fairly simple script. I'm coming from a hobbiest Delphi background, and to be honest I'm finding JavaScript a little bit hard to understand. My requirements are simple - add a new menu item to Bridge which executes a call to a custom dll. Note I'm not expecting the dll to return anything here..
Looking at the samples provided even I can add the menu item - but getting it to successfully call the dll is a bit of a mystery.
The script compiles and adds the menu item, however the menu action doesn't call the dll. I believe it should be a fairly simple task and was hoping somebody here could steer me right. Here's my code (as you'll see a clear cut and paste job from the examples ;o)
Header 1
function SnpAddMenuItem()
this.requiredContext = "\tAdobe Bridge must be running.\n\tExecute against Bridge CS6 as the target.\n";
this.menuID = "snpmyMenu";
this.menuCommandID1 = "snpAddMenuItemSub1";
$.level = 1; // Debugging level
SnpAddMenuItem.prototype.run = function()
var retval = true;
if(!this.canRun()) {
retval = false;
return retval;
// Create the menu element
var newMenu = new MenuElement( "menu", "myMenu", "before Help", this.menuID );
// Create the menu item
var alertCommand1 = new MenuElement( "command", "Load Stuff", "at the end of " + this.menuID, this.menuCommandID1);
alertCommand1.onSelect = function (m1)
        ExternalObject.myDll = new ExternalObject('lib:/C/temp/apmDLL.dll');
        myDll.sendtoACRPM(1);
//      return retval;
SnpAddMenuItem.prototype.canRun = function()
// Must run in Bridge
if(BridgeTalk.appName == "bridge") {
// Stop the menu element from being added again if the snippet has already run
if((MenuElement.find(this.menuID)) && (MenuElement.find(this.menuCommandID)))
// $.writeln("Error:Menu element already exists!\nRestart Bridge to run this snippet again.");
// return false;
            MenuElement.remove(this.menuID);
return true;
$.writeln("ERROR:: Cannot run SnpAddMenuItem");
$.writeln(this.requiredContext);
return false;
if(typeof(SnpAddMenuItem_unitTest ) == "undefined") {
new SnpAddMenuItem().run();

The dll needs to be compatable with the criteria set in the JavaScript Tools Guide. There is an example in the Bridge SDK that can be downloaded from http://www.adobe.com/devnet/bridge.html
But it need someone who is knowledgeable with c++
It would be great if someone could write a wrapper to access other external objects.

Calling a dll from forms 6

Hello,
Sorry, I'm brazilian and my english isn't very good...
I'm trying to call some functions from a dll invoked by a trigger on event WHEN-BUTTON-PRESSED. I make a package as this:
---- Package Spec ----
PACKAGE anserlib IS
     function autoconnect(p_connport in number) return boolean;
END;
---- Package Body ----
PACKAGE BODY anserlib IS
     libhandle ora_ffi.libHandleType;
     autoconnect_fhandle ora_ffi.funchandletype;
     setprinton_fhandle ora_ffi.funchandletype;
     setprintoff_fhandle ora_ffi.funchandletype;
     res varchar2(200);
     commport number;
     function ff_autoconnect(fhandle ora_ffi.funchandletype, p_commport in number) return boolean;
     pragma interface(C, ff_autoconnect, 11265);
     function autoconnect(p_connport in number) return boolean is
     begin
          return(ff_autoconnect(autoconnect_fhandle,p_connport));
     end;
begin
     libhandle := Ora_Ffi.Load_Library('C:\Juarez\Anser\','Anser712.dll');
     autoconnect_fhandle := ora_ffi.register_function(libhandle,'AutoConnect');
     ora_ffi.register_parameter(autoconnect_fhandle, ora_ffi.C_INT);
     ora_ffi.register_return(autoconnect_fhandle, ora_ffi.C_INT);
     setprinton_fhandle := ora_ffi.register_function(libhandle,'SetPrintOn');
     ora_ffi.register_return(setprinton_fhandle, ora_ffi.C_INT);
     setprintoff_fhandle := ora_ffi.register_function(libhandle,'SetPrintOff');
     ora_ffi.register_return(setprintoff_fhandle, ora_ffi.C_INT);
     ora_ffi.generate_foreign(libhandle, 'anser');
exception
     when ora_ffi.ffi_error then
          --message(:bloco_teste.mensagem, acknowledge);
          message(tool_err.message, acknowledge);
END;
and the trigger is:
declare
     v_res boolean;
     v_commport number;
begin
     v_commport := 3;
     v_res := anserlib.autoconnect(v_commport);
end;
When I run the form and press button appears the message (it appears in portuguese to me, maybe the text is not the same in english, but i'll try to translate):
FRM-40734: Internal Error: occours a PL/SQL error.
Someone have an idea to help me...?
Thanks vry much!!! :)

In my opinion this error is something like 'General Protection Fault error' in Windows. I sow this error when my DLL worked with memory incorectly or called OCI functions which don't work under Forms Runtime.
I think the problem might be caused by a mistake inside the DLL. The other problem may be that you use incorect calling conversion. For instance, the default calling conversion in Borland C Builder or Delphi is fastcall, not cdecl.
p.s.
1. Sorry for my English too :).
2.
ora_ffi.generate_foreign(libhandle, 'anser');I'm not sure what ora_ffi.generate_foreign does exactly, because I have never used it. As far as I know it isn't needed for this code. I'd recomend you to remove this line from your program.

How to call labview DLL from visual C++?

Hi,
I'm trying to call a LV DLL from a VC++ application
by using the LoadLibrary and GetProcAddress functions.
The DLL contains a simple sum function. The Library is
loaded correctly, but the result is always 0.0000.
I have loaded a VC++ DLL in a similar way and it works
correctly. Also, I have tested the DLL by loading it in LV,
and it works correctly. The calling convention is defined
to be stdcall in LV Application Builder.
I have also tried this solution, but I will get a compiler error
from one the header files that are created by the LV when
the DLL is made. The error comes from this line
typedef char                int8;
and the error states that
..\fundtypes.h(107) : error C2371: 'int8' : redefinition; different basic types
If someone knows of newer tutorial(for LV 8.2) or knows how to use those
LoadLibrary and GetProcAddress function for LV DLLs, I will appreciate the
information greatly.
Below is the code that I'm using for loading the LV DLL.
Thanks
#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include <map>
#include <windows.h>
int _tmain(int argc, _TCHAR* argv[])
    HINSTANCE LVLib = LoadLibrary(TEXT("Testdll"));
    typedef double (__stdcall *MYPROC)(double, double);
    if (LVLib != NULL)
        MYPROC ProcAdd = (MYPROC) GetProcAddress(LVLib, "Add");
        if (ProcAdd != NULL)
            double d = (ProcAdd)(5.5, 6.6);
            printf("sum = %f\n", d);
        else
            printf("Invalid function pointer\n");
    else
        printf("Failed to load the library\n");
    return 0;

I was just about to post the header file of the DLL, when
I noticed that there's a function called LVDLLStatus.
This little thingie turned out to be a rather handy tool.
With that function I found that in the DLL I had a problem
with another function that prevented the DLL to be correctly
loaded.
This other function in the DLL is for generating digital output
and it worked as it should, when tested from LV.
Anyway if someone is interested, I got it working by using
the LoadLibrary and GetProcAddress function, as in the
source code thatI posted earlier.
I will investigate what is wrong with that digital output, and
post into a another thread if I have problems with that.

Calling C# dll from inside of JavaScript

I have a LabView application that uses javascript to call into some database stored procedures. I was wondering if there is a way of calling a .Net dll from inside of the Javascript without having to register the dll as a COM server. Are there any examples out there that I can take a look at?

That certainly seems like a roundabout way of doing things. Why do you need to use Javascript? Is this related to this question? If found this and this via Google.

Calling LabView DLLs from C/C++

Hi!
Is it possible to call functions in the LabView DLLs directly from
C/C++?
Functions like InvChiSquare in lvanlys.dll has "Adapt to Type" void *
parameters. How do I specify those parameters from C/C++?
I have tried to use the "Build Shared Library" function in LabView to
make a wrapper dll of the "Inv Chi Square Distrubution" vi, but when I
call this function in the dll from C/C++ the function never returns.
Other functions in the same dll that does not use functions in the
lvanalys.dll are working ok.
Regards
Hans Forssell

There are 2 great places to get infomraiton on passing data to dlls, and the data types used. First would be this manual. Using External Code in LabVIEW
The second is the dll examples that ship with LabVIEW 7.0. Go to LabVIEW 7.0\examples\dll\data passing\Call Native Code.vi

How to call Labview DLL from VB2005

Dear all expert,
I'm a student and very new in Labview programming.
Currently i have build a simple vi and need to convert it to dll so that i can call it from my VB.net. But the problem is how to call the labview dll from my VB.net?
I know we must declare function something like this,
Auto function Bodeplot Lib"..\\Bodeplot.dll" (Byval Val1 as double, Byval Val2 as double,...) as double
but how to determine Val1, Val2 (and so on) is input for which data? if my vi have 10 input (frequency, Kc,Fcz,Fcp,Wzrhp,Wp,k,Wz,Beta and Operation) ? and how to select the output (my application have 3 possible output : magnitup loop,phase loop, and degree loop)
In addition, since I'm using Labview 8.0 , and as i know apllication builder for this version cannot convert vi to dll which contain Mathscript (but unfortunely, my vi all use Mathscript), so really hope someone can help me to convert my vi to dll using Labview 8.2 (which remove this limitation).
here I'm attach my Vi and really hope someone willing to help.
Thank you.
Attachments:
bodeplot.vi ‏1049 KB

On Sep 17, 6:40 am, cckoh <[email protected]> wrote:
> Dear all expert,
> I'm a student and very new in Labview programming.
> Currently i have build a simple vi and need to convert it to dll so that i can call it from my VB.net. But the problem is how to call the labview dll from my VB.net?
>  
> I know we must declare function something like this,
>  
> Auto function Bodeplot Lib"..\\Bodeplot.dll" (Byval Val1 as double, Byval Val2 as double,...) as double
>  
> but how to determine Val1, Val2 (and so on) is input for which data?  if my vi have 10 input (frequency, Kc,Fcz,Fcp,Wzrhp,Wp,k,Wz,Beta and Operation) ? and how to select the output (my application have 3 possible output : magnitup loop,phase loop, and degree loop)
>  
> In addition, since I'm using Labview 8.0 , and as i know apllication  builder for this version cannot convert vi to dll which contain Mathscript (but unfortunely, my vi all use Mathscript), so really hope someone can help me to convert my vi to dll using Labview 8.2 (which remove this limitation).
>  
> here I'm attach my Vi and really hope someone willing to help.
>  
> Thank you.
>  
>
> bodeplot.vi:http://forums.ni.com/attachments/ni/170/272124/1/bodeplot.vi
If you insist on using Labview with your project then you should
consider using ActveX in place of using a dynamic link library to
interface to your VB.net code. You don't need "Application Builder"
if you use ActiveX. The Student, Basic and Full development versions
of Labview for Windows come with ActiveX capability. For more
information on ActiveX look up the subject ActiveX in Labview's Help
File.
Howard

Call c++ dll from oracle 10g

can i know how to call a c++ dll from oracle or how to import a c++ dll from oracle
any help plz??

You can call dll's via an External Procedure callout, but the dll needs to conform to the C calling standard rather than c++
http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28424/adfns_externproc.htm#i1006354
Hope it helps,
Greg

Fall into a trouble when calling a dll from java in linux

Hi, experts:
I encountered a big trouble when using JNI to call a C++-compiled DLL from java in Linux: The DLL function didn't execute immediately after the invocation, and was deferred till the end of the Java execution. But all worked well after migrating to windows. This problem made me nearly crazy. Can somebody help me? Thanks in advance.
Linux: fedora core 8, jdk1.6.0_10,
compile options: g++ -fPIC -Wall -c
g++ -shared

It looks like the OP compiled the C source file and linked it into a Windows .dll, which would explain why it worked flawlessly in Windows. (Though I must say the usage of GCC would make someone think it was compiled in Linux for Linux, GCC also exists for Windows, so I'm not sure it's a Windows .dll either...)
@OP: Hello and welcome to the Sun Java forums! This situation requires you to make both a .dll and a .so, for Windows and Linux. You can then refer to the correct library for the operating system using System.loadLibrary("myLibrary"); without any extension.
s
Edited by: Looce on Nov 21, 2008 11:33 AM

Calling a DLL from XI

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