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The GetPlayLength method returns the play length of the object in units pertinent to the object. This is the remaining length that the object can play, not its total length.
Syntax
HRESULT GetPlayLength(
DWORD* pdwLength
);
Parameters
pdwLength
[out] Pointer to a double word containing the remaining play length of the object.
Return Values
If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.
| Return code | Description |
| E_INVALIDTYPE | The object that this interface is associated with is not a valid playable file or a folder or file system containing playable files. |
| WMDM_E_NOTSUPPORTED | This object cannot report the remaining play length. |
| E_FAIL | An unspecified error occurred. |
Remarks
The value of he play length retrieved is either the total length of the object minus the current play position (if the IMDSPObjectInfo::SetPlayLength method has not been called), or the value set by IMDSPObjectInfo::SetPlayLength clipped to be no greater than the total play length of the object minus the current play position.
For playable files, the value returned is specified in milliseconds. The play length information can change either when the user presses play on the media device or when an application invokes the IMDSPDeviceControl::Play method.
For folders or file systems containing playable files, the value returned is in tracks or numbers of playable files in that folder or in the root of that file system.
See Also
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