IWMPMediaCollection::getAll method (wmp.h)
[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 It has been superseded by MediaPlayer.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.]
The getAll method retrieves a pointer to an IWMPPlaylist interface. This interface corresponds to the playlist that contains all media items in the library.
Syntax
HRESULT getAll(
[out] IWMPPlaylist **ppMediaItems
);
Parameters
[out] ppMediaItems
Pointer to a pointer to an IWMPPlaylist interface for the playlist that contains all of the requested media items.
Return value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
|
The method succeeded. |
Remarks
Before calling this method, you must have read access to the library. For more information, see Library Access.
There are two ways you ways you can retrieve an IWMPMediaCollection interface, and the behavior of the getAll method depends on which of those two ways you use. If you retrieve the interface by calling IWMPCore::get_mediaCollection, then the getAll method returns all the media items in the library.If you retrieve the interface by calling IWMPLibrary::get_mediaCollection, then the getAll method returns only the audio items in the library.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Media Player 9 Series or later. |
| Target Platform | Windows |
| Header | wmp.h |
| DLL | Wmp.dll |