The OpenCluster function opens a connection to a cluster and returns a handle to it.
HCLUSTER WINAPI OpenCluster(
  LPCWSTR lpszClusterName  
);
 If the operation was successful, OpenCluster returns a cluster handle.
  Version: Use Windows NT Server Enterprise Edition 4.0.
  Windows CE: Unsupported.
  Header: Declared in clusapi.h.