Loads a previous URL from the History list.
HRESULT back( VARIANT *pvargdistance );
- [in] Pointer to a VARIANT that specifies the number of URLs to go back. If no value is provided, the previous URL is loaded.
Returns S_OK if successful, or an error value otherwise.
This method performs the same action as a user clicking the Back button in the browser.
An error does not occur if the user tries to go beyond the beginning of the history. Instead, the user remains at the current page.