IPortableDevice::Cancel method (portabledeviceapi.h)

The Cancel method cancels a pending operation on this interface.

Syntax

HRESULT Cancel();

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Remarks

If your application invokes the WPD API from multiple threads, each thread should create a new instance of the IPortableDevice interface. Doing this ensures that any cancel operation affects only the I/O for the affected thread.

If an IStream write operation is underway when the Cancel method is invoked, your application should discard all changes by invoking the IStream::Revert method. Once the changes are discarded, the application should also close the stream by invoking the IUnknown::Release method.

Also, note that if the Cancel method is invoked before an IStream::Write method has completed, the data being written may be corrupted.

Requirements

See also

IPortableDevice Interface