SafeArrayAccessData

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This function increments the lock count of an array and retrieves a pointer to the array data.

Syntax

HRESULT SafeArrayAccessData( 
  SAFEARRAY FAR* psa, 
  void HUGEP* FAR* ppvData 
); 

Parameters

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

• ppvData
  [in] On exit, pointer to a pointer to the array data.

Return Value

Returns the HRESULT values shown in the following table.

Remarks

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

Example

The following code example sorts a safearray of one dimension that contains BSTRs by accessing the array elements directly. This approach is faster than using SafeArrayGetElement and SafeArrayPutElement.

long i, j, min; 
BSTR BSTRTemp;
BSTR HUGEP *pBSTR;
HRESULT hr;
// Get a pointer to the elements of the array.
hr = SafeArrayAccessData(psa, (void HUGEP* FAR*)&pBSTR);
if (FAILED(hr))
goto error;
// Bubble sort.
cElements = lUBound–lLBound+1; 
for (i = 0; i < cElements–1; i++)
{
  min = i;
  for (j = i+1; j < cElements; j++)
  {
    if (wcscmp(pBSTR[j], pBSTR[min]) < 0)
      min = j; 
  }
  // Swap array[min] and array[i].
  BSTRTemp = pBSTR[min];
  pBSTR[min] = pBSTR[i];
  pBSTR[i] = BSTRTemp;
}
SafeArrayUnaccessData(psa);

Requirements

See Also

Reference

Automation Functions
SafeArrayCreate
SafeArrayGetElement
SafeArrayPutElement