Causes the scripting engine to abandon any currently loaded script, lose its state, and release any interface pointers it has to other objects, thus entering a closed state. Event sinks, immediately executed script text, and macro invocations that are already in progress are completed before the state changes (use IActiveScript::InterruptScriptThread to cancel a running script thread). This method must be called by the creating host before the interface is released to prevent circular reference problems.
Returns one of the following values:
The call was not expected (for example, the scripting engine was already in the closed state).
The method was queued successfully, but the state has not changed yet. When the state changes, the site is to be called back on the IActiveScriptSite::OnStateChange method.
The method succeeded, but the script has already been closed.