Gets the method that is called when the asynchronous operation completes.
Syntax
HRESULT get_Completed(
  [out] IAsyncOperationCompletedHandler<TResult> **handler
);
Parameters
- handler [out] 
 Type: IAsyncOperationCompletedHandler<TResult>**- The method that handles the completion notification. 
Return value
Type: HRESULT
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
Requirements
| Minimum supported client | Windows 8 | 
| Minimum supported server | Windows Server 2012 | 
| Header | Windows.Foundation.Collections.h |