IWMSContext::GetIndexedValue

banner art

Previous Next

IWMSContext::GetIndexedValue

The GetIndexedValue method retrieves a specific name-value pair, by index, from the context.

Syntax

  HRESULT GetIndexedValue(
  long  lIndex,
  LPWSTR*  pstrName,
  long*  plNameHint,
  VARIANT*  pValue,
  long*  plResultOptions,
  long  lOptions
);

Parameters

lIndex

[in] long integer containing the index.

pstrName

[out] Pointer to an LPWSTR containing the name portion of the name-value pair.

plNameHint

[out] long containing an optional key that can be used to more efficiently access a value.

pValue

[out] Pointer to a VARIANT containing the value.

plResultOptions

[out] Reserved for future use.

lOptions

[in] Reserved for future use.

Return Values

If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.

Return code Number Description
DISP_E_BADINDEX 0x8002000B The property specified by the lIndex parameter could not be found.
E_OUTOFMEMORY 0x8007000E Could not allocate memory to return the name of the property in the pstrName parameter.

Remarks

The GetIndexedValue method allocates memory for the name of the property by calling the CoTaskMemAlloc function. You must release this memory by using the CoTaskMemFree function.

Example Code

// Declare variables.
LPWSTR* lpstrName = NULL;
CComVariant varValue;

// Use a pointer to a context to retrieve a value 
// by index.
HRESULT hr = pContext->GetIndexedValue( i, 
                                        &lpstrName, 
                                        NULL, 
                                        &varValue, 
                                        NULL,
                                        0 );
if( SUCCEEDED( hr ) )
{
    switch( V_VT( &varValue ) )
    {
        case VT_I4:
        {
            // TODO: Process the case.
        }
        case VT_UNKNOWN:
        {
            // TODO: Process the case.
        }
        case VT_CY:
        {
            // TODO: Process the case.
        }
        case VT_BSTR:
        {
            // TODO: Process the case.
        }
        case VT_DATE:
        {
            // TODO: Process the case.
        }
    }
}

EXIT:
    // Release memory allocated for the lpstrName string.
    CoTaskMemFree(lpstrName);
    // TODO: Release temporary objects.

Requirements

Header: wmscontext.h.

Library: WMSServerTypeLib.dll.

Platform: Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition; Windows Server 2008.

See Also

Previous Next
  • Last updated on