IWMDMOperation Interface
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The IWMDMOperation interface is optional. If implemented, it is used by the IWMDMStorageControl interface for data transfer. IWMDMOperation2 extends this interface, making it possible to get and set extended attributes.
In addition to the methods inherited from IUnknown, the IWMDMOperation interface exposes the following methods.
| Method | Description |
| BeginRead | Indicates that a read operation is being started by a method belonging to the IWMDMStorageControl interface. |
| BeginWrite | Indicates that a write operation is being started by a method belonging to the IWMDMStorageControl interface. |
| End | Indicates that a read or write operation is finished, whether successful or not, and accepts a completion code. |
| GetObjectAttributes | Retrieves the content attributes. Audio attributes include the number of samples per second, the number of bytes per sample, and so on. |
| GetObjectName | Retrieves the name of the object (content) being read or written. |
| GetObjectTotalSize | Retrieves the total size of an object, in bytes. |
| SetObjectAttributes | Assigns the content attributes. Audio attributes include the number of samples per second, the number of bytes per sample, and so on. |
| SetObjectName | Assigns a name to the content being read or written. |
| SetObjectTotalSize | Assigns the total size of an object, in bytes. |
| TransferObjectData | Transfers a block of data. |
See Also