The OfflineClusterResource function takes an online resource offline.
DWORD WINAPI OfflineClusterResource(
  HRESOURCE hResource  
);
 If the operation was unsuccessful, OfflineClusterResource can also return a Win32 error value.
  Version: Use Windows NT Server Enterprise Edition 4.0.
  Windows CE: Unsupported.
  Header: Declared in clusapi.h.