See Also
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This method attempts to get the next celtitems in the enumeration sequence, and return them through the array pointed to by rgVar.
Syntax
HRESULT Next( unsigned long celt, VARIANT FAR* rgVar, unsigned long FAR* pCeltFetched ); |
Parameters
- celt
-
[in] Number of elements to be returned.
- rgVar
-
[out] Array of at least size celtin which the elements are to be returned.
- pCeltFetched
-
[out] Pointer to the number of elements returned in rgVar, or NULL.
Return Value
If the number of elements returned is celt, the return value is S_OK.
If the number of elements returned is less than celt, the return value is S_FALSE.
Remarks
If fewer than the requested number of elements remain in the sequence, Nextreturns only the remaining elements. The actual number of elements returned is passed through * pCeltFetched, unless it is NULL.
Example
The following code implements Nextfor collections in the Lines sample file Enumvar.cpp.
 Copy Code
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STDMETHODIMP
CEnumVariant::Next(ULONG cElements, VARIANT FAR* pvar, ULONG FAR*
pcElementFetched)
{
HRESULT hr;
ULONG l;
long l1;
ULONG l2;
if (pcElementFetched != NULL)
*pcElementFetched = 0;
for (l=0; l<cElements; l++)
VariantInit(&pvar[l]);
// Retrieve the next cElements elements.
for (l1=m_lCurrent, l2=0; l1<(long)(m_lLBound+m_cElements)
&&
l2<cElements; l1++, l2++)
{
hr = SafeArrayGetElement(m_psa, &l1, &pvar[l2]);
if (FAILED(hr))
goto error;
}
// Set count of elements retrieved.
if (pcElementFetched != NULL)
*pcElementFetched = l2;
m_lCurrent = l1;
return (l2 < cElements) ? ResultFromScode(S_FALSE) : NOERROR;
error:
for (l=0; l<cElements; l++)
VariantClear(&pvar[l]);
return hr;
}
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Requirements
| Header | oaidl.h, oaidl.idl |
| Library | oleaut32.lib, uuid.lib |
| Windows Embedded CE | Windows CE 2.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |