Initializes the scripting engine.
S_OK if successful, or
E_FAIL if an error occurred during initialization.
Before the scripting engine can be used, one of the following methods must be called:
IActiveScriptParse::InitNew. The semantics of this method are identical to
IPersistStreamInit::InitNew, in that this method tells the scripting engine to initialize itself. Note that it is not valid to call both
IPersist*::Load, nor is it valid to call
IPersist*::Load more than once.