| Argument | Type | Description |
| pmkFirst | IMoniker* | The first element(s) in the new composite. May not be NULL. |
| pmkRest | IMoniker* | The trailing element(s) in the new composite. May not be NULL. |
| ppmkComposite | IMoniker* | Through here is returned the new composite. |
| return value | HRESULT | S_OK, E_OUTOFMEMORY |