Arrays in COM are handled by the SAFEARRAY
struct.
Depending on how the COM object exposes the array, it may return a SAFEARRAY
directly, eg:
SAFEARRAY *psa = obj->GetArrayOfStrings();
VARTYPE vtype;
SafeArrayGetVartype(psa, &vtype);
if (vtype == VT_BSTR)
{
LONG lBound, uBound;
SafeArrayGetLBound(psa, 0, &lBound);
SafeArrayGetUBound(psa, 0, &uBound);
for(LONG i = lBound; i <= uBound; ++i)
{
BSTR str;
SafeArrayGetElement(psa, &i, &str);
...
SysFreeString(str);
}
}
SafeArrayDestroy(psa);
Or it may be wrapped inside of a VARIANT
struct instead, eg:
VARIANT v = obj->GetArrayOfStrings();
if (V_VT(&v) & VT_ARRAY)
{
SAFEARRAY *psa = V_ARRAY(&v);
...
}
VariantClear(&v);
Either way, the elements inside of the array may or may not be wrapped inside of VARIANT
structs, eg:
SafeArrayGetVartype(psa, &vtype);
if (vtype == VT_VARIANT)
{
...
VARIANT elem;
VariantInit(&elem);
SafeArrayGetElement(psa, &i, &elem);
...
VariantClear(&elem);
...
}