The WINTRUST_PROVIDER_CLIENT_INFO structure contains information about the client component of a trust provider. The trust provider’s WinTrustProviderClientInitialize function passes WinTrust a pointer to this dispatch table.
typedef struct _WINTRUST_PROVIDER_CLIENT_INFO {
DWORD dwRevision;
LPWINTRUST_PROVIDER_CLIENT_SERVICES lpServices;
DWORD dwActionIdCount;
GUID * lpActionIdArray;
} WINTRUST_PROVIDER_CLIENT_INFO, *LPWINTRUST_PROVIDER_CLIENT_INFO;
GUID, WINTRUST_PROVIDER_CLIENT_SERVICES, WinTrustProviderClientInitialize