IMDSPObjectInfo::GetTotalLength method (mswmdm.h)
The GetTotalLength method retrieves the total play length of the object in units pertinent to the object. The value returned is the total length regardless of the current settings of the play length and offset.
HRESULT GetTotalLength( [out] DWORD *pdwLength );
Pointer to a DWORD containing the total length of the object, in units pertinent to the object.
The method returns an HRESULT. All the interface methods in Windows Media Device Manager can return any of the following classes of error codes:
- Standard COM error codes
- Windows error codes converted to HRESULT values
- Windows Media Device Manager error codes
The value returned in the pdwLength parameter is the total length of the object regardless of the current settings of the play length and play offsets.
For playable files, the total length is specified in milliseconds.
For folders or file systems containing playable files, the value returned indicates the total number of playable files in a folder or in the root of a file system.