How to fill the SafeArray with double datatype values using SafeArrayPutElement

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*pEventCode is my safearray... dEventCd is the 'double' value...I want to insert the dEventCd values to my *pEventCode safearray one by one when (bPriv) is true... Please help. I get E_INVALIDARG error.

C++

lResult=SafeArrayUnlock(*pEventCode);
HRESULT hr = SafeArrayDestroyData(*pEventCode);

for(INT_PTR count(0); count < nEventCnt; ++count)
{
    mapEventCds.GetNextAssoc(pos, dEventCd, bPriv);

    if (bPriv)
    {
        hr = SafeArrayPutElement(*pEventCode, &iEventCdIdx, &dEventCd);
        iEventCdIdx++;
    }
}

Posted 7-Nov-13 7:01am

Guru16

Updated 7-Nov-13 7:04am

v2

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Jonathan Davies · Answer 1 · 2013-11-07T08:28:00

Solution 2

Looking at http://msdn.microsoft.com/en-us/library/windows/desktop/ms221170(v=vs.85).aspx[^] there doesn't seem to be a double type for safearray - which I gather is your problem. Though there is a user defined type but I haven't looked at how to use it.

Posted 7-Nov-13 8:28am

Jonathan Davies

Comments

CPallini 7-Nov-13 16:00pm

There is. It is the VT_R8.

Jonathan Davies · Answer 2 · 2013-11-07T07:50:00

Something like this merged with your code? You have to work with the limits of the safearray

C++

//Check dimensions of the array:
LONG lLBound, lUBound;
long element; //for array indexing
HRESULT hr;
	
// Get the lower bound of the array
hr = SafeArrayGetLBound(*pEventCode, 1, &lLBound);
if (FAILED(hr))
{
   //Handle Error
}

// Get the upper bound of the array
hr = SafeArrayGetUBound(*pEventCode, 1, &lUBound);
if (FAILED(hr))
{
   //Handle Error
}


// put your array elements into the SAFEARRAY
for( element = lLBound; element <= lUBound; element++ )
{
    hr = SafeArrayPutElement(*pEventCode, &element, &dEventCode);
    if(FAILED(hr))
    {
         // Handle Error
    }	
}