swieru

problem with: COM method with structures as arguments

2 posts in this topic

Hello,

I am trying to write very basic script to use COM object. It is a specific object allowed to communication with software on the industrial controller.

I can create reference to a COM object by function ObjCreate. Thanks to ObjectName function I can read all information about object. Problem is that, I can trigger (only) one method of this object, named Disconnect().

When I want to use the other method instead of Disconnect(), for example, ReadValueN I have problem with arguments for this method. I tryed many variants, combinations, without positive result. My error monitoring function (for COM errors) reports: "Bad variable types" or "Type mismath".

I studied many examples, many documentations but I have no idea how it should be.

Below is description for method, data etc based on OLE/ COM Object Viewer.

long ReadValueN(

     [in] long TARGET_id,

     [in] PARAM_DEF* pParamDef,

     [out] BUFFER* pResBuffer);
typedef struct tagPARAM_DEF{

     unsigned char Param1;

     unsigned char Param2;

     unsigned char Param3;

     unsigned char ParamT[8];

     short Number;

     unsigned char ValueF;

     unsigned char ValueD;

} PARAM_DEF;


typedef struct tagBUFFER{

     unsigned char BuffA1;

     unsigned char BuffA2;

     unsigned char BuffA3;

     unsigned char BuffTable[256];

} BUFFER;
$structParamDef = DllStructCreate("byte; byte; byte; byte[8]; short; byte; byte")
$structBuffer = DllStructCreate("byte; byte; byte; byte[256]")

$response = $myObject.ReadValueN(0, DllStructGetPtr($structParamDef), DllStructGetPtr($structBuffer))

;$response = $myObject.Disconnect() ; is working

Could someone write me what is wrong and how it should be? And especially - why?

thanks in advanced

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If you provide referency for the object you're using maybe should be easy to help you.

 

Saludos

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      PropertyItem class:
      https://msdn.microsoft.com/en-us/library/windows/desktop/ms534493(v=vs.85).aspx
      Found other topics about this function in other languages where they used a blank string as the buffer, so I tried using a char array, which doesn't work. Just cannot figure out how to create the struct buffer to hold the data.
    • zetaimmersion
      By zetaimmersion
      Hi all. 
      I am trying to do 2 things but i cannot seem to get any traction on how to read/implement this idea.
      Premise: PowerPoint file in C\temp\presentation.pptx that contains on the first slide 2 entries as "<one>" and "<two>" which need to be replaced with "user1" and "user2", then a silent Outlook send mail containing the file with a predefined body and subject.
      I narrowed it down to COM objects as the Office does not like intrusive open AutoIt functions. I installed OLE/COM Object Viewer to understand how to create the commands but i am still stuck. So far i am trying to user water's code but i suck
      COM object i was originally trying to modify
      Dim $oPPT, $oPres $oPPT = ObjCreate("PowerPoint.Application") $oPPT.Visible = True $oPres = $oPPT.Presentations.Read Water's code below (0.1% modified)
      #include <File.au3> #include "PowerPoint.au3" #include <misc.au3> Global $sFile = "C:\temp\presentation.pptx" Global $sString2Search = "<username>", $sString2Replace = "Password", $iReplaceOnce = 1, $sFullLogFile = "C:\temp\pptxlog.txt" _ProcessPpt($sFile) Func _ProcessPpt($sFile) $oApp = _PPT_PowerPointApp() Local $bChange = False Local $oInterface = $oApp.Presentations Local $oPresentation = $oInterface.Open($sFile, False, False, False) If @error Then _FileWriteLog($sFullLogFile, "E Error " & @error & " opening File " & $sFile) Return SetError(1, 0, 0) EndIf ;it does not even open my file and from here not sure how to read the text and replace it EndFunc ;==>_ProcessPpt  
    • YellowLab
      By YellowLab
      I am having a very unique, but repeatable problem with ImageMagick COM interface. Here are the applicable lines of code:
      $oIM=ObjCreate("ImageMagickObject.MagickImage.1")
      and then later on...
      $oIM.Convert(String($arFileList[$nFileIndex])&'[0]',"-alpha", "remove",@TempDir&"\temp.jpg")
      the array points to a pdf file with the "convert" command converting the first page of the pdf to a jpg with any alpha layer removed.
      Every time, without fail, the first time I run the script on a freshly booted machine it crashes on the $oIM.Convert command. It does this if it isn't compiled and says there is an error executing the command on the object. If compiled, i get an error that autoit has stopped responding. Anytime I run the script, compiled or not, after this initial crash everything works perfectly fine.
      I am totally at a loss as to why this is occurring and how to correct it.