IsParentOnlyReference
Check if the event is only more referenced by its parent.
HRESULT IsParentOnlyReference([out,
retval] BOOL* pVal);
Parameters
pVal
[out, retval] pointer to a BOOL variable to store the return value.
Return Values
S_OK
Success.
S_FALSE
The event does not have a parent. *pVal is False.
E_POINTER
pVal was no valid pointer