BOOL GetBinaryFromVariant(COleVariant & ovData, BYTE ** ppBuf, unsigned long * pcBufLen)
{
BOOL fRetVal = FALSE;
//Binary data is stored in the variant as an array of unsigned char
if(ovData.vt == (VT_ARRAY|VT_UI1)) // (OLE SAFEARRAY)
{
//Retrieve size of array
*pcBufLen = ovData.parray->rgsabound[0].cElements;
*ppBuf = new BYTE[*pcBufLen]; //Allocate a buffer to store the data
if(*ppBuf != NULL)
{
void * pArrayData;
//Obtain safe pointer to the array
SafeArrayAccessData(ovData.parray,&pArrayData);
//Copy the bitmap into our buffer
memcpy(*ppBuf, pArrayData, *pcBufLen); //Unlock the variant data
SafeArrayUnaccessData(ovData.parray);
fRetVal = TRUE;
}
}
return fRetVal;
}



BOOL PutBinaryIntoVariant(COleVariant * ovData, BYTE * pBuf,unsigned long cBufLen)
{
BOOL fRetVal = FALSE;
VARIANT var;
VariantInit(&var); //Initialize our variant
//Set the type to an array of unsigned chars (OLE SAFEARRAY)
var.vt = VT_ARRAY | VT_UI1;
//Set up the bounds structure
SAFEARRAYBOUND rgsabound[1];
rgsabound[0].cElements = cBufLen;
rgsabound[0].lLbound = 0;
//Create an OLE SAFEARRAY
var.parray = SafeArrayCreate(VT_UI1,1,rgsabound);
if(var.parray != NULL)
{
void * pArrayData = NULL;
//Get a safe pointer to the array
SafeArrayAccessData(var.parray,&pArrayData);
//Copy data to it
memcpy(pArrayData, pBuf, cBufLen);
//Unlock the variant data
SafeArrayUnaccessData(var.parray);
*ovData = var;
// Create a COleVariant based on our variant
VariantClear(&var);
fRetVal = TRUE;
}
return fRetVal;
}