Is NetShareAdd still valid for Windows Server 2012 within a Failover Cluster?

We are trying to use NetShareAdd to create a share on the system and have it recognized in the clustered resource.  So the clustered resource name is "ExileOnMainSt" and thus:

SHARE_INFO_503 si503 = { 0 };
si503.shi503_servername = L"EXILEONMAINST";
si503.shi503_netname = L"TSV"
si503.shi503_type = STYPE_DISKTREE;
si503.shi503_remark = L"";
si503.shi503_permissions = ACCESS_READ;
si503.shi503_max_uses = 0xFFFFFFFF;
si503.shi503_path = L"S:\\TSV";
DWORD dwParmErr = 0;
NET_API_STATUS eNetErr = NetShareAdd(L"EXILEONMAINST", 503, (LPBYTE) &si503, &dwParmErr);

I'm receiving ERROR_INVALID_PARAMETER but dwParmErr is zero when the spec says it should be one of the following:

#define SHARE_NETNAME_PARMNUM         1
#define SHARE_TYPE_PARMNUM            3
#define SHARE_REMARK_PARMNUM          4
#define SHARE_PERMISSIONS_PARMNUM     5
#define SHARE_MAX_USES_PARMNUM        6
#define SHARE_CURRENT_USES_PARMNUM    7
#define SHARE_PATH_PARMNUM            8
#define SHARE_PASSWD_PARMNUM          9
#define SHARE_FILE_SD_PARMNUM       501
#define SHARE_SERVER_PARMNUM        503

This works in Windows Server 2008 R2. Has the functionality changed?

Adam