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The BeginRead method indicates that a read operation is being started by a method belonging to either the IWMDMStorageControl interface or the IWMDMDeviceControl interface.
Syntax
HRESULT BeginRead();
Parameters
This method takes no parameters.
Return Values
If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.
| Return code | Description |
| WMDM_E_USER_CANCELLED | The application instructs Windows Media Device Manager to cancel the current operation without waiting for it to finish. |
| E_FAIL | An unspecified error occurred. |
Remarks
When the method to which this interface has been passed is beginning to read data, the BeginRead method must be the first in the IWMDMOperation interface to be called. If either E_FAIL or WMDM_E_USER_CANCELLED is returned, the End method is called to indicate that the process has been terminated. If the application is using block mode and returns WMDM_E_USER_CANCELLED, then Windows Media Device Manager will return this same error to the application.
See Also
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