title: "AsyncBase Class | Microsoft Docs"

ms.custom: ""

ms.technology: ["cpp-windows"]

ms.topic: "reference"

f1_keywords: ["async/Microsoft::WRL::AsyncBase", "async/Microsoft::WRL::AsyncBase::AsyncBase", "async/Microsoft::WRL::AsyncBase::Cancel", "async/Microsoft::WRL::AsyncBase::CheckValidStateForDelegateCall", "async/Microsoft::WRL::AsyncBase::CheckValidStateForResultsCall", "async/Microsoft::WRL::AsyncBase::Close", "async/Microsoft::WRL::AsyncBase::ContinueAsyncOperation", "async/Microsoft::WRL::AsyncBase::CurrentStatus", "async/Microsoft::WRL::AsyncBase::ErrorCode", "async/Microsoft::WRL::AsyncBase::FireCompletion", "async/Microsoft::WRL::AsyncBase::FireProgress", "async/Microsoft::WRL::AsyncBase::get_ErrorCode", "async/Microsoft::WRL::AsyncBase::get_Id", "async/Microsoft::WRL::AsyncBase::get_Status", "async/Microsoft::WRL::AsyncBase::GetOnComplete", "async/Microsoft::WRL::AsyncBase::GetOnProgress", "async/Microsoft::WRL::AsyncBase::OnCancel", "async/Microsoft::WRL::AsyncBase::OnClose", "async/Microsoft::WRL::AsyncBase::OnStart", "async/Microsoft::WRL::AsyncBase::put_Id", "async/Microsoft::WRL::AsyncBase::PutOnComplete", "async/Microsoft::WRL::AsyncBase::PutOnProgress", "async/Microsoft::WRL::AsyncBase::Start", "async/Microsoft::WRL::AsyncBase::TryTransitionToCompleted", "async/Microsoft::WRL::AsyncBase::TryTransitionToError"]

When overridden in a derived class, starts an asynchronous operation.

void

) = 0;