ILRUCache::Lookup
Use this method to retrieve the value of an element from the cache.
Definition
HRESULT ILRUCache::Lookup(BSTRbstrKey,VARIANT*pvarValue);
Parameters
bstrKey
[in] A BSTR that contains the name of the element to be retrieved.
pvarValue
[out,retval] A pointer to a VARIANT used to return the value.
Return Values
This method returns an HRESULT indicating whether it completed successfully. See the Error Values section for more details.
Error Values
This method returns S_OK (0x00000000) to indicate success and standard COM HRESULT error values to indicate failure. For more information about standard COM errors, see Standard COM Errors. Additional information may be available using the global Err object, which can be accessed using the API function GetErrorInfo. In particular, the GetDescription method of the IErrorInfo interface may return a text description of the error.
Remarks
The pvarValue parameter contains valid data only if the property was accessed successfully.
For more information about memory ownership issues related to COM property and method parameters, see Managing COM Parameter Memory.