DLL structure pointer

Similar Questions

• read dll void pointer

  I have a dll function that I've written in a call library function node.

  It is structured as follows:

  int DataGetLatest (int unisgned * puFrameNumber,)

  unisgned int * puElements,.

  unisgned int * puFlags,.

  void * pDataDest)

  pDataDest is defined as a structure as follows:

  typedef struct PositionStruct

  {

  float x;

  float y;

  float z;

  } Position

  I want to get the data in pDataDest and manipulate.

  I saw some data validation int you say add another call to this function:

  Then create a new node library call and fill in as follows:

  Library name: LabVIEW
  Function name: MoveBlock
  Calling Convention: cdecl
  Run in the UI Thread

  Return value: void
  1 parameter: name: source; Type: uInt32 passed by value
  2 parameter: name: dest; Type: int32 passed as a pointer
  3 parameter: name: len; Type: int32 passed by value

  How can I get structured data?

  GuruDoo wrote:

  I came across another complication.  I got my program works as long as the elements of the structure are of uniform type (all floats, unit8, etc.) as follows:

  Tips or tricks when the elements of the structure are not uniform (floats and characters etc) or embedded structures as follows:

  typedef struct SensorDataStruct

  {

  unsigned char ucPeak;

  unsigned char ucDRC;

  unsigned char ucCode;

  unsigned char ucPeakNibble;

  } SensorData

  typedef struct FullRawDataStruct

  {

  float fCentroid [NUM_SENSORS]

  SensorData SensorData [NUM_SENSORS]

  } FullRawData

  I have trouble getting the case as it works.  Thanks for the help again.

  So, you're in trouble a little more. Basically you can always do a table correctly size flat with the denominator less of everything. Here, you have two possibilities:

  (1) a table of 2 * elements float32, then index the strange elements, their conversion of type Int32, cross the Swap bytes and exchanging words and catalogued in an Int8 (u) table which will give you 4 single-byte integers.

  (2) tables of 8 * int8 elements (u) s and then extract the 4 elements of the 8 * n cast to an int32, cross the Swap bytes and exchanging words and catalogued a number single precision and also extract the four elements of the n * 8 + 4 and use them as your items 4 tank.

  In LabVIEW > 8 you have another option to pass in an array of 8 * items uInt32', pass it through a Byte Array function in the chain, then through a Unflatten of string with the correct boutien for your selected platform and the "data includes array or string of size? (T)"input the value false.

  Do not skip a string of size appropriate to the function as a string C pointer if you want to retrieve the binary data of the function. LabVIEW to the return of the function parses the string and terminate at the first NULL byte it encounters and return only the part since it is the standard way of C for termination of string buffer.

  All this is a lot of work and for other more complicated cluster tables, it may be more work and fiddling so I have most of the time suggest that you write a little wrapper DLL in C instead of do more easily.

  Example above could be as simple as:

  typedef struct SensorDataStruct

  {

  unsigned char ucPeak;

  unsigned char ucDRC;

  unsigned char ucCode;

  unsigned char ucPeakNibble;

  } SensorData

  typedef struct FullRawDataStruct

  {

  float fCentroid [NUM_SENSORS]

  SensorData SensorData [NUM_SENSORS]

  } FullRawData;

  typedef struct LVFullRawDataStruct {}

  Int32 size;

  FullRawData data [1];

  } LVFullRawData, * LVFullRawDataHandle;

  Int32 myFunc (..., FullRawData pData [], int32 numElm,...);

  Int32 LVFunction (..., LVFullRawDataHandle pData,...)

  {

  return myFunc (..., (* pData)-> data, (* pData)-> size,...);

  }

  Since there is no alignment problem in this structure of C, you can just build one to a cluster of the C structure and pass it in the form of a table of these elements to the LVFunction who will disassemble the handle table of LabVIEW and pass its elements such as C data types to the real function of C.

  C alignment problems can be managed by adding as dummy byte (uInt8 elements) in the cluster of LabVIEW for LabVIEW is always carried out total of bytes from packaging.

  Rolf Kalbermatter

• VI = external dll function pointer reference?

  So I'm porting this simple program in C in LabVIEW. It receives signals of a haptic (Sensable Phantom Omni) material. It should be simple, but it showed several complications. (been stuck for 2 weeks )

  I managed to import the material with all its functions DLL (using LV 8.2, because 8.5 and 8.6 Assistant sucks).

  But there is a function whose argument is a function pointer:

  hUpdateHandle = hdScheduleAsynchronous (updateDeviceCallback, 0, HD_MAX_SCHEDULER_PRIORITY);

  I already have the corresponding VI to updateDeviceCallback (which is a (void *) who don't really use and returns an int).

  hdScheduleAsynchronous is part of the API of the material (I'm not kidding with her, and I know what's inside), and as first argument expects a function pointer.

  Can I use the node reference to open VI to get the "pointer" for my VI and then feed him as an argument for the external DLL? How to properly mount the ref VI data type in a function pointer?

  Although DLL probably uses the C calling convention and then Visual C like prefixing underscore before the exported name. Node to call library of LabVIEW bypasses that you entered because when he's trying to GetProcAdress a function name, and the operation fails, it automatically retries with the name of function with added underscore. For your own "Wrapper"DLL", you will have to do something similar, or use the right name.

  But while the reminder THAT DLL is indeed must be written in C to avoid trouble, functions to load the library and GetProcAddress can be easily implemented directly in LabVIEW by using the node library call. It lets more easily play you with such things as the function names.

  Rolf Kalbermatter

• Receives the following message: procedure the directory of the dll entry point 'W' could not be located in the library of links Dynamics kernel32.dll.

  PROCEDURE ENTRY POINT SET THE 'W' DLL DIRECTORY COULD NOT BE LOCATED IN DYNAMIC LINK LIBRARY KERNEL32. DLL. MESSAGE APPEARS...

  PROCEDURE ENTRY POINT SET THE 'W' DLL DIRECTORY COULD NOT BE LOCATED IN DYNAMIC LINK LIBRARY KERNEL32. DLL. THIS MESSAGE APPEARS.

  Hello

  1. when exactly you receive this error message?

  2 did you a recent software or hardware changes to the system?

  3. are you able to start the system in normal mode?

  Method 1:

  If this a recent issue, then you try to perform a restore of the system to a prior restore point you have been affected by the issue.

  Note: When you perform the system restore to restore the computer to a previous state, programs and updates, that you have installed are removed.

  To run the system restore, you can consult the following link:

  How to restore Windows XP to a previous state

  Method 2:

  You can also scan SFC on the computer that would be a system file corrupt on the computer search and replace.

  The analysis may take some time, so be patient. Windows allows to fix corrupt or missing files it finds. If the information of the installation CD is required to fix the problem, you may be asked to insert your Windows XP installation CD.

  a. Click Start, click Run, type cmdand then click OK.

  b. in the sfc/scannow command line type, then press on enter

  Description of Windows XP and Windows Server 2003 System File Checker (Sfc.exe)

• Gdiplus.dll error, point of entry DllRegisterServer was not found. This file cannot be saved

  Hello
  I have a HP laptop Compaq Presario R3000 running XP sp2.
  While trying to install software for my new HP laserjet printer 451color, I couldn't finish because my computer seems to have a problem with the file gdiplus.dll.  After a regsvr32 in the "Run" dialog box, I get the following message: "gdiplus.dll was loaded, but the DllRegisterServer entry point was not found.  This file cannot be saved. " This problem MAY occur in the past, while the installation of other software or printer, I don't remember, but I CAN get frustrated with it and simply ignored and passed without being able to use everything I tried to add. (I get so tired things does not in the way they are supposed to!)

  I've updated to SP3, which did not help.  I am considering a system recovery. I don't want to lose all my programs, drivers, etc.. I did a search and read as a:
  «Startup Repair replace only damaged or missing Windows startup files.» In a Windows XP repair install, Windows all files are replaced no matter whether or not they wish to. Note: If you use a disk to restore your computer manufacturer instead of an installation disc of original Windows download, a Startup Repair or repair install as stated in the above linked guides would not be possible. »
  I don't want to click on the wrong thing and screw this place! Can anyone tell me if these a repair overwrite of the windows file system is an option with the operating system microsoft windows xp home sp1 disk?
  Is there a better way to solve this problem?
  Any help is appreciated.
  Thanks, Jeff

  jeffbrom,

  While this article is not about the issue that you are experiencing it however has a patch to replace a bad file gdiplus.dll. Give the patch a whirlwind (it should replace and properly record) and I would like to know the results:

  http://support.HP.com/us-en/document/c00615478

  Good luck!

• Kernal32.dll / entry point Dllregisterserver was not found

  Photoshop on Win Xp,

  error: Kernel32.dll not found entry point.

  Then as an administrator at CMD prompt:

  Regsvr322 kernel32.dll

  Error: Kernel32.dll was responsible, but the not found Dllregisterserver entry point.

  Bought a 3rd partry to fix all Dll files. No help.

  Uninstalled photoshop, & fact Regsvr kernel32.dll, still the same error.

  Help, please.

  I appreciate any help in this matter.

  Thank you

  Thank you for your response. I just went thru full all the utilities patch update for win Xp, & that takes care of it. Thank you once again.

  Sent from my iPhone

• ADVAPI32. DLL - the entry point of procedure not found in the dll

  I just updated my OS from Win XP x 64 for Win 7 x 64. On my XP, I had a program called VVD works just fine. The software is protected by HASP device.

  When you install the VVD on my new operating system, at the end of the installation, an error message comes up with the title "ADVAPI32.dll" followed with a red circle with a white "x" mark and text "the entry point of procedure not found in the dll."

  According to the Publisher of the software, the program is running (and install) free disorder on many machines x 64 Win7 so there must be something special on my PC.

  Shoul, I try to replace the file? How do I do that?

  Any help is greatly appreciated.

  Hello.

  I just did a clean boot and tried to install the software. I got the same message: "the procedure not found in the dll entry point." This message appears at the end of the installation during "update system configuration. Please wait. »

  I don't think that I have no viruses. I run Microsoft Security Essentials on my machine. In addition, installation also failed on two other Win7 computers with the same message. I tried to install the software in all kinds og compatibility modes but keep getting the same exact message. Is there another way/method I could use to isolate the problem?

  The problem is now resolved after SafeNet has released a new version og the pilot.

  Thank you for the effort.

• dll memory allocation issues

  Hello

  I recently had trouble with a program that calls a dll that I write in C. The dll uses LabView functions for the memory manager to allocate and free memory for a string of Labview in an ErrorCluster.

  I know there has been a lot of posts on this topic, but none seemed exactly applies to my case.

  At the start of the vi, everything works well in the beginning, only when it ends and restart, LabView crashes. It seems as if LabView crashes as soon as it tries to free memory (amended) of th Errorcluster.

  Starngely what it always crashes. The program could be running 2 - 3 times in a row, then fall for the third time.

  I managed to reproduce the error in a small program. VI and the dll code are attached.

  I hope that I did not lack a post that already addresses this problem.

  Thanks for your help/advice

  There is nothing intrinsically wrong about changing the string handles in a LabVIEW DLL, but you must confirm to the Protocol.

  There is a very likely potential problems with your C code.

  Yoou should really ensure good packing your definition of cluster of error with

  #pragma pack (1)

  #pragma pack()

  for 32-bit Windows. Otherwise you can get by with the alignment as LabVIEW for Windows problems use packing byte to its data structures, but your C compiler will probably try to align the code string and the error on the limits of 4 bytes, resulting in your DLL corrupt pointer real string handle bad.

  In addition to this your handling and the copy of the Stiring is VERY low and therefore prone to errors.

  Instead your SetError() function might look more like this:

  MgErr SetError(LVError *thisError, LVBoolean thisStatus, int32_t thisCode, char *thisSource)
  
  {
  
      int newsize = StrLen (thisSource);
      MgErr err;
  
  Set status and Code
  
      thisError-> status = thisStatus;
  
      thisError-> code = thisCode;
  If (thisError-> source)
          ERR = DSSetHandleSize (thisError-> source, newsize + sizeof (int32));
      on the other
      {
          thisError-> source = DSNewHClr (newsize + sizeof (int32));
          If (! thisError-> source)
               ERR = mFullErr;
      }
      If (! err)
      {
            MoveBlock (thisSource, LStrBuf (*(thisError->source)), newsize);
            LStrLen (*(thisError->source)) = newsize;
      }
      return err;
  }

  and it could be even simpler:

  MgErr SetError(LVError *thisError, LVBoolean thisStatus, int32_t thisCode, char *thisSource)
  
  {
  
      int newsize = StrLen (thisSource);
      MgErr err;
  
  Set status and Code
  
      thisError-> status = thisStatus;
  
      thisError-> code = thisCode;
  ERR = NumericArrayResize (uB, 1, & (thisError-> source), newsize);
      If (! err)
      {
            MoveBlock (thisSource, LStrBuf (*(thisError->source)), newsize);
            LStrLen (*(thisError->source)) = newsize;
      }
      return err;
  }

• dll files and manifest

  Problem: DLL written in CVI (for use with teststand) depends on another DLL, written in MSVC ++ 2008. When you try to use the CVI DLLS in TestStand in fails to find msvcr90.dll. Even though I made sure that MSVC ++ 2008 Redistributable (32-bit) are installed.

  Problem seems to be that MSVC ++ 2008 runtime is installed as "side by side Assembly" in the winsxs directory and are a few tips in the form of a manifest file are needed to find the proper performance.

  I'm not sure where I can / should use the manifest file. Made the MSVC ++ 2008 DLL must be distributed with the manifest (embedded file or separately). Or can I create as a manifesto for the CVI DLL and where I can find documentation to do?

  The manifest file must be in the DLL built in VC. This VC DLL is one that depends on the "side-by-side" msvcr90.dll and therefore must have a manifest declaring this dependence. The CVI DLL has nothing to do with this issue and it is not all clear - put a manifesto in the CVI DLL would not help. By default, VC automatically embed the manifest when it generates the DLL - so it must already exist in the VC DLLS. You can see the manifest by opening the DLL in the VC resource editor and research in the RT_MANIFEST resource section.

  I think that the most likely cause of the problem is that the manifest in your DLL VC points to a different version/version of msvcr90 DLL - this could be because:

  (1) you are using a debug version. VC redistributable installs only the Release version of msvc90.dll, and this is different from the flavor of debugging of msvcr90.dll. Solution: use a Release version of your VC DLL.

  (2) you have a DLL most recent msvcr90 computer development (possibly due to a patch), but a former redistributable installation on the machine target. If so, try to patch your target computer. I think 1 is more likely that 2.

• problem with Transition vi measures lvanlys.dll

  I use this 'measure of Transition vi' for a while and had no problems. But now, I suddenly feel that the question of the present vi, transitional measure, gives me an error of-20310. I am assured that these inputs than vi, wfm in and dt, having entered correct. The problem occurred when the vi called for this dll, lvanlys.dll. Here's what I found;

  • "lvanlys.dll" is located in c:\Program NIUninstaller Instruments\LabVIEW 2009\resource, and that it points to the right path in vi (Yes, I'm using LabVIEW 2009)
  • interesting thing is that when I find this dll using the research of a window, he could not find the dll in this path, instead he sought that I used in a different project in the different path (once again, for this project I'm pointing to the right path of the dll - C:\Program NIUninstaller inst...)
  • I tried to change the path of this dll and pointing to this path of vi, but WITHOUT success and gave the same problem
  • I don't think it's the problem DLL loading, I was able to do this by using different path where the dll (at least I do not see complaints of LabVIEW)

  What I'm missing here? I appreciate for all your help.

  'Wavefrm Graph 2' is only for my purpose of troubleshooting, and I'm removing it after all done. But I agree with you on that.

  I ended up re - install LabVIEW and the problem disappeared. I always am furstrated the fact that I still don't know what went wrong and the root cause of the problem has been, and how this re - install the LabVIEW has solved the problem. However, I appreciate your help indeed.

• How to treat you with button interrupts on the 537 ez - lite

  Sorry for the newbee question, but I'm just familiar with the jury of 537 ex - lite.  I want to use the buttons to cause an interruption and then this interruption with a service code.  What I have to write a separate VI to handle the interrupt, or I can put it in a structure of the event in the vi that I write...?  Finally, I would like to be able to write an event-driven state machine in the fins... In the attachment, I can button scan and as he lights a led, but I would use the interrupt enable and get the number of the button as an event / box pair to do the same thing... How?

  Thanks for your suggestions.

  Hummer1

  Hummer1,

  The call library function Node (COLD LAKE) that is configured to run with the dll works with features that sees what button was pushed on the BF537. You can double-click that and see what dll it points to and what function it interacts with. Since the deployment of resources target shipped you will have to compile the code LV, in C and machine code using a 3rd part of the compiler is just to do the work of generating C for you. You could probably accumulate the feature yourself using just the screw provided but endearing tape in these support libraries is better because you do not have to reinvent the wheel and lots of screws that you would end up with are actually just wrappers for other DLLs.

• [C] moveblock problem?

  I have a LabVIEW and DLL C of the code.

  The C DLL takes a wide range of UINT16 values and it decodes a form of sense.  Data that results are stored in a static table inside the DLL structure.  The Structure consists of integers, floats, strings, and arrays.

  The DLL also has a function to return the elements of the structure.  Each structural element is returned as a separate parameter entry.  Some of them are arrays, for example:

  void GetMyData (..., unsigned char * myArray [],...);

  I know how great 'myArray' is.

  In LabVIEW, I have a "call library function Node" for the above function.  For the berries, I used "Pointer digital, full 32-bit signed value".  The "address" that is returned by this call I switch to 'LabVIEW:MoveBlock' call as defined in the examples on this forum.  pre-allocating table that is the correct size and then copying the bytes inside the 'address '.

  If I just run my LabVIEW VI crashes.  If I walk through it however (spanning the node library DLL function calls) and then I get the data from the DLL as expected.  However if I then close LabVIEW it crashes.

  MoveBlock is safe to use?  Is there another way to get data from a DLL tables?

  Thank you.

  Looks like you have the library node call correctly put in place, but you initialize the table you're passing in there?  You need to initialize an array of sufficient size or set the minimum table size in the library node call so LabVIEW can do for you.  If you pass an array too short you will probably get an accident since your DLL will attempt to write to this memory location and overwrite something else.

  You should also initialize the string that you pass to your DLL if you wait the DLL to fill.

  It may also be useful for defining the level of error control dial the node of the library to the maximum for debugging purposes; This can help catch some memory problems.

• FF takes longer than Chrome to begin

  I have been using ff for 2 years. I noticed that when comparing chrome one ff, FF takes a long time to start.
  I used these plug-ins:

        Adobe Acrobate 10.1.9.22
        Java deployment Toolkit 7.0.650.20 10.65.2.20
        Java(TM) Platform SE 7 U65  10.65.2.20
        Shokewave Flash 13.0.0.214
        Silveright Plug-In 5.1.30214.0
        VLC Web Plug-in 2.1.3.0
        VLC Web Plugin 2.0.6.0
        Picasa 3.0.0.0(Disabled)
  and Themes:
         FT Deep Dark 10.3.8   (using now)
         3D Digital Blue Dlow
         Default 30.0
         LavaFox V2-Green 2.2.6
         Metal Lion Austrails Theme 2.0.1.4.91
         Simple White 2.1.4
  

  enrichment:

         AdBlock Plus 2.6.3
         avast!Online Security 8.0.1506
         Download Status bar 10.1.0
         Youtube ALL HTML5 2.1.3
         Lightbeam 1.0.10.1    (disabled)
  

  Windows is Windows 7 64-bit, RAM DDR3 2 GB.

  To remove VLC, type about: plugins in your address bar, scroll down until you see the VLC plugin and delete the dll file pointed by ' path:'.

  It can also help to disable hardware acceleration, as pointed out by multiple users.

  To disable hardware acceleration follow the instructions in the post following disable hardware acceleration.

  I noticed Firefox slower than Google Chrome spear as well.

  It's good to hear that Firefox is faster in safe mode.
  Safe mode is faster because it turns off a lot of different modules, plugins and other things.

  Maybe have a look at the plugins as well in the plug-ins section and disable those you don't use often.

  You don't have to remove completely the plug-ins, but you can disable them also teporarily. In the menu dropdown.

  To completely remove a plug-in you can uninstall the software that comes with it. To do this take a look at this article: remove the Plug-ins.

  I don't expect Firefox to become as fast as Chrome, but following the steps above, I think that Firefox can speed up considerably.

• I have upgraded to 6.0.1 and now firefox no loades ANY more. I get this XULRunner error: platform version '5.0' not compatable with minVersion > = 6.0.1 and maxVersion < = 6.0.1. What can I do to get Firefox working again as my browser?

  After removing everything, I tried also to reload fresh 3.6.12 and I get a totally different nss3.dll entry point cannot be found error.

  Maybe one of these articles will help you?

  • http://KB.mozillazine.org/Browser_will_not_start_up#XULRunner_error_after_an_update
  • Firefox does not start - solutions

• VIMBA with Labview

  Hello

  is there anyone who have successfully used VIMBA SDK with Labview?

  You need to download version 1.3

  Use the LabVIEW import DLL

  Point to the VimbaC dll, not C++

  Put _WIN32 in the compiler directives.  This you will get part of the way.