'宣言 Property Completed As C1.Win.Document.AsyncOperationWithProgressCompletedHandler(Of TResult,TProgress)
'使用法 Dim instance As IAsyncOperationWithProgress(Of TResult,TProgress) Dim value As C1.Win.Document.AsyncOperationWithProgressCompletedHandler(Of TResult,TProgress) instance.Completed = value value = instance.Completed
C1.Win.Document.AsyncOperationWithProgressCompletedHandler<TResult,TProgress> Completed {get; set;}