Calling a VI as ActiveXObject using Javascript

Question

Hello,
I would like to control a Labview-VI (Version 7.1) from a Javascript-program by using the ActiveXObject-model.
It looks like that:
    lvapp = new ActiveXObject("Labview.Application");
    viPath = "C:\\test.vi";
    vi = lvapp.GetVIReference(viPath);   // Load the vi into memory
    vi.FPWinOpen = 1;                               // Open front panel
    var paramNames = new Array(["Input","Output"]);   // create array with parameter names
    var paramVals  =     new Array([125,0]);                       // create array with parameter values
    vi.Call(paramNames, paramVals);    // call Labview  --> error occurs here
    alert("Result from LV:"+paramVals[1]);
Starting Labview and loading the VI works fine. The scripts stops during the "Call"-methode.
Problem is, that an error occurs which indicates that VI-object does not unterstand
the Javascript array structure ("expected 1D-array"). If I call theVI without parameters everything
works fine, but this makes no sense since I cant exchange data with LV.
The same programm coded in VisualBasic-Script worked fine also.
Is there anyone who knows of which type parameters for "Call"-mehode must look like in
Javascript?? Every hint is welcome.
Regards

Answer 1

Sorry, this replay was submitted befored finished...
Hi Brian
That was the hint I looked for:
  > The only other thing you could do would be to use the SetControlValue/GetControlValue to do the I/O one control at a time.
Since I stranded to create the mentioned SAFEARRAY of VARIANTs I tried it with the following way:
   lvapp = new ActiveXObject("Labview.Application");
    viPath = "C:\\test.vi";
    vi = lvapp.GetVIReference(viPath);   // Load the vi into memory
    vi.FPWinOpen = 1;                               // Open front panel
    vi.SetControlvalue("Input",125)       // set the input parameter, 125 is just a sample
    vi.Run();                                               // run the VI here, the"Call"-methode without parameter does not work since it uses
                                                                  // the defaults of the controls
    var paramNames = new Array(["Input","Output"]);   // create array with parameter names
    var paramVals  =     new Array([125,0]);                       // create array with parameter values
    vi.Call(paramNames, paramVals);    // call Labview  --> error occurs here
    alert("Result from LV:"+paramVals[1]);