The IDirectMusicGraph::GetTool method retrieves a tool by index.
HRESULT GetTool(
  DWORD dwIndex,
  IDirectMusicTool** ppTool
);
 If the method succeeds, the return value is S_OK.
If it fails, the method may return one of the following values:
| DMUS_E_NOT_FOUND | 
| E_POINTER | 
The application is responsible for releasing the retrieved tool.
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
  Header: Declared in dmusici.h.