IWMPSubscriptionService::startBackgroundProcessing method (subscriptionservices.h)

아티클
4/26/2023

[The feature associated with this page, Windows Media Player SDK, is a legacy feature. It has been superseded by MediaPlayer. MediaPlayer has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer instead of Windows Media Player SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Note This section describes functionality designed for use by online stores. Use of this functionality outside the context of an online store is not supported.

The startBackgroundProcessing method is implemented by the online store to initiate background processing tasks.

Syntax

HRESULT startBackgroundProcessing(
  [in] HWND hwnd
);

Parameters

[in] hwnd

A handle to a window in which the plug-in can display a user interface.

Return value

The method returns an HRESULT.

Remarks

Your code should not perform lengthy operations synchronously when Windows Media Player calls this method. Instead, you must perform time-consuming tasks on a separate worker thread.

Windows Media Player calls startBackgroundProcessing during idle time after the user selects the online store. This is useful for the online store to acquire play count data or renew expired licenses.

Requirements


Minimum supported client	Windows Media Player 9 Series or later.
Target Platform	Windows
Header	subscriptionservices.h