SafeArrayPutElement (Windows Embedded CE 6.0)

项目
01/05/2012

1/6/2010

This function assigns a single element to the array.

Syntax

HRESULT SafeArrayPutElement(
  SAFEARRAY FAR* psa, 
  long FAR* rgIndices, 
  void FAR* pv 
);

Parameters

psa
[in] Pointer to an array descriptor created by SafeArrayCreate.

rgIndices
[in] Pointer to a vector of indexes for each dimension of the array.

The right-most (least significant) dimension is rgIndices[0].

The left-most dimension is stored at rgIndices[psa->cDims –1].

pv
[out] Void pointer to the data to assign to the array.

The variant types VT_DISPATCH, VT_UNKNOWN, and VT_BSTR are pointers, and do not require another level of indirection.

Return Value

Returns the HRESULT values shown in the following table.

Value	Description
S_OK	Success.
DISP_E_BADINDEX	The specified index was invalid.
E_INVALIDARG	An argument is invalid.
E_OUTOFMEMORY	Memory could not be allocated for the element.

Remarks

This function calls SafeArrayLock and SafeArrayUnlock before and after assigning the element.

If the data element is a string, object, or variant, the function copies it correctly.

If the existing element is a string, object, or variant, it is cleared correctly.

Passing invalid (and under some circumstances NULL) pointers to this function causes an unexpected termination of the application.

Multiple locks can be on an array. Elements can be put into an array while the array is locked by other operations.

Example

HRESULT PASCAL __export CPoly::EnumPoints(IEnumVARIANT FAR* FAR* ppenum)
{
  unsigned int i;
  HRESULT hresult;
  VARIANT var;
  SAFEARRAY FAR* psa;
  CEnumPoint FAR* penum;
  POINTLINK FAR* ppointlink;
  SAFEARRAYBOUND rgsabound[1];
  rgsabound[0].lLbound = 0;
  rgsabound[0].cElements = m_cPoints;
  psa = SafeArrayCreate(VT_VARIANT, 1, rgsabound);
  if(psa == NULL){
    HRESULT = ResultFromScode(E_OUTOFMEMORY);
    goto LError0;
  }
  // Code omitted here for brevity.
    V_VT(&var) = VT_DISPATCH;
    HRESULT = ppointlink->ppoint->QueryInterface(
    IID_IDispatch, (void FAR* FAR*)&V_DISPATCH(&var));
    if(HRESULT != NOERROR)
      goto LError1;
    ix[0] = i;
    SafeArrayPutElement(psa, ix, &var);
    ppointlink = ppointlink->next;
  }
  HRESULT = CEnumPoint::Create(psa, &penum);
  if(HRESULT != NOERROR)
    goto LError1;
  *ppenum = penum;
  return NOERROR;
LError1:;
  SafeArrayDestroy(psa);
LError0:;
  return hresult;
}

Requirements

Header	oleauto.h
Library	oleaut32.lib
Windows Embedded CE	Windows CE 2.0 and later

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