Multiple CallBack functions

Is it possible to have multiple Callback functions, i.e. to do more than one 'imgSessionWaitSignalAsync2(...)' call with the same session ID?
As it would be e.g. in ...:
void NI_grab:tartGrabNow(bool bMaster) {
bIsMaster = bMaster ;
iFrameNumber = 0 ;
iReturnValue = imgSessionStartAcquisition(siSessionId) ;
timeBeginPeriod(1) ;
iReturnValue1 = imgSessionWaitSignalAsync2(
siSessionId,
IMG_SIGNAL_STATUS,
IMG_FRAME_DONE,
IMG_SIGNAL_STATE_RISING,
&xSessionWaitSignalCallbackPadTimeStamp,
this
// The 'xSessionWaitSignalCallbackPadTimeStamp' will put the time stamps in a queue buffer, ...
iReturnValue2 = imgSessionWaitSignalAsync2(
siSessionId,
IMG_SIGNAL_STATUS,
IMG_BUF_COMPLETE,
IMG_SIGNAL_STATE_RISING,
&xSessionWaitSignalCallbackProcessImage,
this
; bStoppingAcquisition = bAllGrabbersStoppingAcquisition = false ;
// ... which is read by 'xSessionWaitSignalCallbackProcessImage', so that the
// time stamps are padded into the correct images.
// I consider it fully possible that there are sometimes "two or three" acquired images
// in the "input FIFO pipes"....
bInterfaceOK = (iReturnValue == 0) ;
bAcquisitionRunning = true ;
Best regards
Staffan Cronström

Thanks. Please seriously consider making both the GetLocalObject and GetLocalInt et al fixes available in 1.5 - as you can imagine, they are cornerstone blocks for building debuggers (which is what I have done).
Is the fix you are testing related to -server or JVMTI itself?

Similar Messages

How to write c wrapper it containing callback functions

hi here shambhu below call can be containing some call back functions ,how can create wrapper for this,please suggest me
_export int GDSRegisterStation(char *sPort, char* sPanel, int iStation, GDSCallback lpGDSTaskCall); /*
This call hooks up user application onto the GDS environment. From this point on, the GDS application has continuous, concurrent access to the virtual machine representing the test system. As multiple independent test systems may be hooked onto the same host computer, the call needs to specify a "Port" (unsigned uPort) to which GDS memory access is sought. Character string sPanel (up to 63 chars) identifies the calling GDS task to the Virtual Machine. This entry will assist the System Manager in monitoring active GDS tasks by their assigned names. As multiple test stations (each with one or more control channels) may be associated with the same controller, (int) iStation specifies the station to which this application will be connected. (GDSCallback) lpGDSTaskCal specifies the subroutine in the user application that is to be installed as the real-time callback into the Virtual Machine. From this moment on, the specified subroutine will be automatically called by the Virtual Machine to periodically All subsequent calls to the GDS library will apply to this Station and its control channels. This call is made only once and prior to other GDS calls. 0 is returned upon normal completion -1 is returned if the call was a failure due to absence of GDS space associated with the call. Make sure station is connected and On-Line and make sure Port No was correct in the call -2 is returned if the application was already registered by a previous call

You will have to write a wrapper DLL in C which converts the callback event into a LabVIEW compatible event. The most versatile way would be to generate a user event with the PostLVUserEvent() LabVIEW manager function. Callback functions are however an advanced C programming construct, so you should definitely have a pretty decent understanding of C programming before starting this endeavour. Otherwise you end up with a not working solution or maybe even worse, one that seems to work sometimes but doesn't really do the right thing.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

How to create a callback function module

Hi all,
I am working in a requirement where we need to call a function module at a 'after change' event. So how to create a callback function module and register it with the crmvevent ?_
I created a sample function module and try to create entries in table crmv_event_cust, but i got an error message saying that the function module name I provided is not in table CRMC_FUNC_ASSIGN. When I try to create entry there, I got a message that function module is not in CRMC_OBJ_FUNC and that table is a standard table with no maintanance options !!
looks like i am going in wrong way ... can any one please help ??

Looking at my system all you need to do is create the entry for the callback function in maint view: CRMV_FUNC_ASSIGN.
Your entry should be as simple as Z-function name Object Function - <same as others in the segment you are assigning>
IE for the partner it would be CRM_PARTNER as object function, for general order processing CRM_ORDER
Take care,
Stephen

Calling a method from a callback function under ARC

Hi All
I previously wrote some HIDManager software. The HIDManager references were done in a Objective C class so within this object you have the code:
    IOHIDManagerRegisterDeviceMatchingCallback( k8055HIDManager, k8055BoardWasAdded, (__bridge void*)self );
Which registers with the HIDManager
The Callback function which is outside the class was as follows:
static void k8055BoardWasAdded(void* inContext, IOReturn inResult, void* inSender, IOHIDDeviceRef k8055HIDDevice)
    IOHIDDeviceOpen(k8055HIDDevice, kIOHIDOptionsTypeNone);
    CCVellemanK8055Driver * k8055 = (__bridge CCVellemanK8055Driver *)inContext;
    [k8055 setHardwareConnectionStatus : YES];
Any how my problem is in converting the code to ARC as under OS X 10.9 SDK and 64bit I'm now getting a EXC_BAD_ACCESS (Code=EXC_I386_GPFLT) at this line
    CCVellemanK8055Driver * k8055 = (__bridge CCVellemanK8055Driver *)inContext;
although removing the method
[k8055 setHardwareConnectionStatus : YES];
will alow it to build but then obviously the app won't work as required.
Could someone suggest a ARC safe way of accessing the passed instance so I can again call methods on it.
Cheers
Steve

Try using blocks instead. This is the callback I am using for libcurl.
static size_t callback(
void * contents, size_t size, size_t nmemb, void * context)
size_t (^block)(void *, size_t) =
    (__bridge size_t (^)(void *, size_t))context;
size_t result = block(contents, size * nmemb);
return result;

Not able to use multiple grid function in smartview

Hi,
One of my client want to use multiple grid function in Hyperion smartview and he was using latest version of Hyperion smartview 11.1.2.5. But still that feature was not enabled in smart view.
Our's is windows environment and essbase server version 11.1.2.1 and APS version 11.1.2.1.
Can anyone please help me to resolve this issue.
Please let me know if i might missed anything or still if any info required.
Thanks in Advance.
Thanks,
Kumar.

Thanks for your help Celvin. I will try to apply the path for both APS and essbase server and will check.
Thanks once again.
Regards,
Vinay Kumar.

Multiple Partner Functions for a Sales document Item

Hi,
Can you please advise on modeling scenario for showing multiple partner functions for a given sales document in BI Report ..
Because Key figure values should not be distributed for multiple records just becos of multiple partner functions but users want to see them in the reports along with sales doc and key figure
I am explaining bit more clearly...
I can achieve above requirement by having below model ..
SDOC ITEM PF1 PF2 PF3 AMOUNT
1000 10 AB CD EF 50000
PF : Partner Function
but as I feel it is a complicated task to add more and more columns fro partner functions as and when new partner functions have been added or requested to show by users at sales doc level...
So Can you please advise a better solution to meet the same requirement.
Thanks & Regards,
BRK
Please advise me on this scenario
Thanks & Regards,
BRK
Edited by: BRK on Jul 22, 2008 9:19 AM
Edited by: BRK on Jul 22, 2008 9:29 AM

SalesDoc______Item_______PartnerFunction________Amount
80000_________10_____________A1_______________$1000
80000_________10_____________A2_______________$1000
80000_________10_____________A3_______________$1000
This will be the normal display in the cube if there is only one Partner Function.
But what we need is
SalesDoc______Item_______PartnerFunction________Amount
80000_________10_____________A1_______________$1000
80000_________10_____________A2_________________' '
80000_________10_____________A3_________________' '
The Amount (KF) should be populated only for the first record for a SalesDoc / Item combo.
You load data from source to the ODS, say delta.
Suppose that the below record is already available in the ODS.
SalesDoc______Item_______PartnerFunction________Amount
80000_________10_____________A1_______________$1000
And you get the following data as DELTA in the Data_Package from the source.
SalesDoc______Item_______PartnerFunction________Amount
80000_________10_____________A2_______________$1000
80000_________10_____________A3_______________$1000
If you populate the Amount again for these 2 records, then the total would sum to $3000, which is wrong.
So what we do is,
Write a Select stmt for ALL ENTRIES in Data_Package and fetch the records from the target ODS. Have it in an Internal table, say t_ODS1
Take the SalesDoc / Item from the Data_Package and chk if it is present in the internal table t_ODS1.
If it is present, then populate the Amount as ' ' (Blank)
Else populate the Amount as $1000.
Say, you are getting 3 new records, which is not present in the ODS1.
In that case, your internal table t_ODS1 will be blank.
Now again, we need to populate the Amount only for the first record among the 3 records.
So, here comes the "Flag".
Set the Flag as X, when we populate the Amount.
Everytime chk the Flag <> X.
Only if it is <> X, populate the Amount.
Else Leave it Balnk.
Hope I have explained in detail
Regards,
Balaji V

How to change the Callback function of a GUI button?

I would like to change the callback function associated with a GUI button dynamically in the programming way.
Here is the code piece I tried, but it does not seem to work:
const char* pstrLabelSaveJpeg = "SaveJpegCb";
SetCtrlAttribute(pahel_id, ctrl_id ,ATTR_LABEL_TEXT, pstrLabelSaveJpeg);
int CVICALLBACK SaveJpegCb(int panel, int control, int event, void *callbackData, int eventData1, int eventData2);
Solved!
Go to Solution.

The attribute you used is about the "label" of the button.
It is just an appearence attribute. You can write your own name on it, but that does not change the callback function.
You should change the ATTR_CALLBACK_FUNCTION_POINTER attribute, and you should not pass the function name as a string.
So your function call will look like this:
SetCtrlAttribute(pahel_id, ctrl_id, ATTR_CALLBACK_FUNCTION_POINTER, SaveJpegCb);
Of course, you have to declare the SaveJpegCb function somewhere above that line.
I think you have already done that.
S. Eren BALCI
www.aselsan.com.tr

Mail to multiple Partner function

Hi,
We are in process of implementing SOLMAN CHARMS .
i have a requirement where i need to send mail to multiple partner function.
I have created a z action , however it gives option to select only one Partner function.
Is there any way to send mail to multiple Partner function or any workaround for this?
Kindly suggest.
Regards,
Sangvir Singh

Hello Sangvir,
As stated, you can create multiple actions (if you do that, don't forget to properly tune the action merging). This is the best option, because involves only configuration.
You can also add a few ABAP code in a new implementation of the standard send mail method and add multiple mail destinations in the "To" or "CC" fields. This is simpler than sounds to be. Ask for an ABAPper to analyze the method source code and he/she will adapt it for you in a question of hours.
Best Regards,
C Canzone

Queue with callback function not dequeuing

Hi,
I would like to ask you for help or for a hint regarding our problem with the queue:
A trigger is enqueuing to a queue. This works fine, but the callback function is never called. The queue already worked for a while, but since i changed something at the procedure called by the callback it does not work anymore.
I already have tried the following:
-Stopping and restarting
-Dropping and recreating (with the scheduler having no jobs anymore)
-Dropping, restarting the database and recreating
None of these worked. Where do I fail, when considering that the queue with the same scripts worked already? I post the script for creating the queue and adding the subscriber:
CREATE OR REPLACE TYPE pat_history_queue_payload_type AS OBJECT
( TSTAMP VARCHAR2(22 CHAR),
TYP VARCHAR2(10 CHAR),
DELTA_MENGE NUMBER,
ORIGIN VARCHAR2(1 CHAR),
TEXT VARCHAR2(1000 CHAR),
QL_TSTAMP VARCHAR2(22 CHAR)
BEGIN
DBMS_AQADM.CREATE_QUEUE_TABLE (
queue_table => 'pat_history_queue_table',
queue_payload_type => 'pat_history_queue_payload_type',
multiple_consumers => TRUE
END;
BEGIN
DBMS_AQADM.CREATE_QUEUE (
queue_name => 'pat_history_queue',
queue_table => 'pat_history_queue_table',
max_retries => 10
DBMS_AQADM.START_QUEUE (
queue_name => 'pat_history_queue'
END;
BEGIN
DBMS_AQADM.ADD_SUBSCRIBER (
queue_name => 'pat_history_queue',
subscriber => SYS.AQ$_AGENT(
'pat_history_queue_subscriber',
NULL,
NULL )
DBMS_AQ.REGISTER (
SYS.AQ$_REG_INFO_LIST(
SYS.AQ$_REG_INFO(
'pat_history_queue:pat_history_queue_subscriber',
DBMS_AQ.NAMESPACE_AQ,
'plsql://PAT.HISTORY_QUEUE_DISTRIBUTION.CALLBACK',
HEXTORAW('FF')
1
END;
The function CALLBACK which is called by the queue, is never called, I checked that with log messages. Also the package that contains the function is compiled ok.
Thanks.
Roland

Hi,
Does the subscription show up correct in sys.reg$ ?
Regards,
Harry
http://dbaharrison.blogspot.com/

TCP Callback function passing data to teststand

Hi,
I'm trying to pass data via a TCP Callback function to teststand using the TCP steptype that I downloaded from Ni.
When I open a connection, container data is passed to the dll on which it creates a connection, the dll in part creates a TCP Callback function.
The handle obtained from the connection is then passed back through the container data, and the dll returns back to the sequence editor which will execute the next steps.
The problem is that when the TCP Callback function gets an TCP_READY event it can not pass data to TestStand because it can not access the container data.
How can this TCP Callback function pass/alter data to/in Testand?
Thank you...

Yes ThiCop,
That's exactly what I want to establish!
Here is the example code:
//Function needed by the TCP functions
int CVICALLBACK MsgHandler (unsigned handle, int event, int error, void *callbackData)
    char receiveBuf[256] = {0};
    char displayBuf[7] = {0};
    char * tempLookup;
    int dataSize = sizeof (receiveBuf) - 1;
   switch (event)
      case TCP_CONNECT:
         break;
      case TCP_DISCONNECT:
         break;
     case TCP_DATAREADY:
         if ((dataSize = ClientTCPRead (handle, receiveBuf, dataSize, 1000)) > 0)
               // Send data from receiveBuf to a variable in teststand ????
               //  TS_PropertyGetValString (HandleObject, NULL, "Step.Result.Data", 0, &tempLookup);
               //  TS_PropertySetValString (HandleObject, NULL, tempLookup, 0, receiveBuf);
         else
               receiveBuf[dataSize] = '\0';
        break;
return 0;
void __declspec(dllexport) TX_TEST TCPConnectF(tTestData * testData, tTestError * testError)
    int                 error = 0;
    int                 TCPerror;
    double           Port;
    double           Timeout;
    char              *HandleLookup;
    char              *ServerAdd;
    char              *CallbackData;
    ErrMsg           errMsg = {'\0'};
    ERRORINFO   errorInfo;
    tsErrChk (TS_PropertyGetValString (testData->seqContextCVI, &errorInfo, "Step.Result.Handle", 0, &HandleLookup));
    tsErrChk (TS_PropertyGetValNumber (testData->seqContextCVI, &errorInfo, "Step.Result.Port", 0, &Port));
    tsErrChk (TS_PropertyGetValString (testData->seqContextCVI, &errorInfo, "Step.Result.IP", 0, &ServerAdd));
   tsErrChk (TS_PropertyGetValNumber (testData->seqContextCVI, &errorInfo, "Step.Result.Timeout", 0, &Timeout));
   tsErrChk (TS_PropertyGetValString (testData->seqContextCVI, &errorInfo, "Step.Result.Data", 0, &CallbackData));
    TCPerror = ConnectToTCPServer (((unsigned int *) &ConnectionHandle), ((unsigned int) Port), ServerAdd, MsgHandler, 0, Timeout);
    if (TCPerror != 0)
    //Get TCP Error Message
       sprintf(errMsg,"%s",GetTCPErrorString ( TCPerror ));
       error = TCPerror;
       goto Error;
tsErrChk (TS_PropertySetValNumber (testData->seqContextCVI, &errorInfo, HandleLookup, 0, ((double) ConnectionHandle)));
Error:
    // FREE RESOURCES
    CA_FreeMemory(HandleLookup);
    CA_FreeMemory(ServerAdd);
    // If an error occurred, set the error flag to cause a run-time error in TestStand.
    if (error < 0)
        testError->errorFlag = TRUE;
        testError->errorCode = error;
        testData->replaceStringFuncPtr(&testError->errorMessage, errMsg);
    return;

MIDI in using DLL callback function

I am trying to get MIDI into LV. The dll used is winmm.dll and the function midiinopen (plus others) is described here:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/multimed/htm/_win32_midiinopen.asp
The main problem is I don't know how to program the Call Library Function Node properly in order to perform the call
plus set it to start receiving callback data, being midi messages. I have tried creating and registering a User Event and
passing the Event ref to the dll's "dwCallback" and then trapping the callback in an Event Structure, but nothing happens.
I have studied the "Communicating with a Windows MIDI Device in LabVIEW" example but it gives no hint since midi out
does not require the use of callbacks.
Please advice,
Stefan

Vedeja wrote:
I am trying to get MIDI into LV. The dll used is winmm.dll and the function midiinopen (plus others) is described here:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/multimed/htm/_win32_midiinopen.asp
The main problem is I don't know how to program the Call Library Function Node properly in order to perform the call
plus set it to start receiving callback data, being midi messages. I have tried creating and registering a User Event and
passing the Event ref to the dll's "dwCallback" and then trapping the callback in an Event Structure, but nothing happens.
Damn! Need to make this post shorter as this message
board just silently told me that it needs to be shorter than 5000 words
and ate up my lengthy repsonse with no way to get it back.
You can't configure a Call Library Node to pass a Callback function to
another function. Callback functions have been alien to LabVIEW for a
long time with good reasons and what it has now as callback function in
LabVIEw 7.1 and newer is not directly compatible with C callback
functions.
Basically as you want to get data from the callback function back into
LabVIEW there is really no way around some intermediate software layer
which in this case almost surely means your own specific wrapper DLL
written in C.
If you use LabVIEW 7.1 you could use user events but not in the way you
describe. Attached is an example of how you can use user events from
external code. Note the extra DLL you will have to write. You have to
watch out what data you pass back to the user event as it has to match
exactly the type you configured the user event for, otherwise LabVIEW
will simply crash on you.
For numerics this is quite simply and also shown in the example. For
strings you can't just pass back a C string pointer but you will have
to allocate a LabVIEW string handle with
handle = DSNewHandle(sizeof(int32) + <length of C string>)
and then copy the C string into it. For specifics about how to do this
you should refer to the External Code reference manual in your Online
Bookshelf. Similar rules apply for arrays or clusters for that matter.
If you want or need to do this for LabVIEW < 7.1 there are two
possible approaches but both are even less trivial. You could either
create a wrapper DLL that translates your callback events into LabVIEW
occurrences and for the data transfer back to LabVIEW you would have to
implement your own queing too, or you could use the Windows Message
Queue example somewhere here in the NI examples and adapt it to return
your specific data. That would solve the data queueing more or less for
you without having to worry about that.
Rolf Kalbermatter
Message Edited by rolfk on 05-22-2006 11:22 AM
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions
Attachments:
userevent.zip ‏27 KB

JNI Multithreading/Callback Function Design Issues

Ok, I have been working on this for quite some time now and I simply can not figure it out. So any ideas are more than welcome. :)
I have Java code that uses a DLL that I created in C++. My C++ code links with a library made by a 3rd party (don't have access to the source or anything). The 3rd party's code creates a new thread and calls a callback function that I define in my C++ code. This callback is called continuously until I perform some other code to stop it. Now for the tricky part. In my callback function I need to pass some data back in Java. Here is where my design falls apart. Since the callback function is technically part of the 3rd party's thread, I have to call AttachCurrentThread() in the callback to get the JNIEnv pointer in order to ultimately call my desired Java method. The problem is that my Java method (or even the C++ callback function) are only invoked if I do a sleep() in my C++ code after I start the 3rd party code which creates the thread. If I do a Thread.sleep() in Java after I call the native function code, it just sleeps and the callbacks never get called. It appears as though the thread dies as soon as I return from my C++ code.
So now I am stuck. I have tried creating a thread in Java which simply calls the C++ code and the C++ code just loops waiting for an updated flag, however, this causes the 3rd party's thread creation code to fail (not quite sure why). However, even if their code worked, I'm not convinced this is even proper design. I apologize if this is simply a threading design principle as my multithreading programming techniques are a bit rusty and I've never done a multithreaded application this complex (this is a simplified version, but the idea is the same).
I welcome any suggestions or even documentation that may lead me in the right direction. Thanks in advance.

I have a similar issue.
from java I call a dll I wrote, which calls a third party scanner dll (cyber.dll). Everything works ok, except, when an event in the scanner occurs, it calls the call backin my dll, which calls the callback in java, which kills the vm with an access violation. If I execute the call back to java from a c method which I just called from java, it works, but if it gets called outside of the java execution of the native code, it fails.
I havent done anything with treads or syncronisation. Do I need to do this AttachCurrentThread stuff? If so, where do I get the _jvm handle as Im not starting the vm from c?

Callback functionality in Web dynpro

Dear Experts,
How i can implement a web dynpro application which gets updates from server without any interaction from the end user? in the same time I dont want to trigger a full refresh using timed trigger as this will slow the application. is there any functionality like Ajax partial refresh or callback functionality?
Best Regards
ebrahime

>
ebrahime wrote:
> Dear Experts,
> How i can implement a web dynpro application which gets updates from server without any interaction from the end user? in the same time I dont want to trigger a full refresh using timed trigger as this will slow the application. is there any functionality like Ajax partial refresh or callback functionality?
>
> Best Regards
> ebrahime
If you want to update with ajax a web dynpro application, you can not do this In CE 7.1 or earlier (I really don't know about 7.11). You can do this for example with a portal application, if it isn't something specific for the wd application you can move it outside and place it somewhere with your wd application, some playing with the pages will do this work.
You can do another thing: place a portal application, which will be invisible and will call some web service via ajax and use portal eventing to "inform" your we dynpro application. But in this case when you receive the event it will behave like the timer trigger, it will redraw you page.

In VB6, why is the "GPIBNotify sub" (from the GPIBNotify AtiveX Ctrl) all the time called even if no Event happened? This callback function is started then stopped permanently as if its received SRQ from the GPIB Bus. Any ideas?

I'm programming in Visual Basic 6 to communicate between a computer and HP Measurement Devices (BER-Meter) with GPIB. I have already read information and code for this. My platform is W98. The NI488.2 commands can be sent without any problem between the equipements. However when I'm using the GPIBNotify ActiveX Control to use the callback function, there is a permanent starting and stop of the GpibNotify Sub. The SetupMask and RearmMask are set to RQS and the HP Device is well configured. Moreover an oscilloscope measuring the 10th line (SRQ
) of the bus didn't show any pulse on the line behalf the right one. Any Idea?

Hello-
So, the SRQ is not detected by the oscilloscope? It must be a setting that is not correct with the instrument. Try contacting the manufacturer of the instrument for details about SRQ's. The GPIBNotify ocx will not be able to react to an SRQ if there isn't one.
Randy Solomonson
Application Engineer
National Instruments

Import dll callback function

Having trouble with this line "void (*m_callback)(_t_pciCommand *cmd);" in PciApi.h file. I have replaced it with NULL and was able to import 2 functions, PciAllocCommand and PciSendCommand. I was then able to get valid information using GetValueByPointer.VI, but crash most of the time.
typedef struct _t_pciCommand
                t_pciCommandType                      m_command;
                t_commandError                          m_error;
                long                                               m_gpVal;
                void                                                (*m_callback)(_t_pciCommand *cmd);
                long                                              m_param[MAX_PCI_PARAMS];
                int                                               m_state;
                int                                               m_retries;
                int                                               m_expected;
                long                                            m_origParam[MAX_PCI_PARAMS];
} t_pciCommand;
All files attached. Based on this callback funtion, I can't seem to resolve 2 functions, called PciAllocCommand and PciSendCommand.
Thanks,
John
Solved!
Go to Solution.
Attachments:
PciApiDll7.zip ‏630 KB

The manual is "pci_api_manual_jb.doc", The funtion I care most about is PciAllocCommand and the #1 issue I have is how to pass "m_param[0]" , "m_param[1]" and "m_param[2]" to the dll. The original h file is "PciApp(original).h" . The second issue would be if removing the callback functionality I need a VI to poll the status of "t_PciCommand "Function without writing to it.
For example, PciAllocCommand(c_baudrate, NULL, 0). How do I set baud = m_param[0]?
Also I am adding a TestApp.exe example of what I want to do in Labview, focusing on the Param1 and Param2
Attachments:
PciApiDll7.zip ‏630 KB
TestApp.zip ‏67 KB

Multiple CallBack functions

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