Function PyCom_InterfaceFromPyInstanceOrObject

com/win32com/src/PyComHelpers.cpp:167–189

BOOL PyCom_InterfaceFromPyInstanceOrObject(PyObject *ob, REFIID iid, LPVOID *ppv, BOOL bNoneOK /* = TRUE */)
{
	if (ob == Py_None){
		*ppv = NULL;
		if (bNoneOK)
			return TRUE;
		PyErr_SetString(PyExc_TypeError, "None is not a valid interface object in this context");
		return FALSE;
		}

	if (PyObject_IsInstance(ob, (PyObject *)&PyIUnknown::type))
		return PyCom_InterfaceFromPyObject(ob, iid, ppv, bNoneOK );

	ob = PyObject_GetAttrString(ob, "_oleobj_");
	if (ob==NULL) {
		PyErr_Clear();
		PyErr_SetString(PyExc_TypeError, "The Python instance can not be converted to a COM object");
		return FALSE;
		}
	BOOL rc = PyCom_InterfaceFromPyObject(ob, iid, ppv, bNoneOK );
	Py_DECREF(ob);
	return rc;
}

BOOL PyCom_InterfaceFromPyObject(PyObject *ob, REFIID iid, LPVOID *ppv, BOOL bNoneOK /* = TRUE */)
{