Returning Error Information

Using the COM error handling interfaces and functions, you can return error information by following the steps below:

1. Implement the ISupportErrorInfo interface.
2. To create an instance of the generic error object, call the CreateErrorInfo function.
3. To set its contents, use the ICreateErrorInfo methods.
4. To associate the error object with the current logical thread, call the SetErrorInfo function.

The error handling interfaces create and manage an error object, which provides information about the error. The error object is not the same as the object that encountered the error. It is a separate object associated with the current thread of execution.