Resets the state of the control.
Resets all HTTP headers as well as EDIData, etc. After invoking this method the class may be reused as if it were newly created.
This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)