This structure contains an OID and a pointer to its related function. It is used with the CryptInstallOIDFunctionAddress function.
If the high-order word of the OID is nonzero, this member is a pointer to either an OID string, such as 22.214.171.124 or an ASCII string, such as file. If the high-order word of the OID is zero, the low-order word specifies the numeric identifier to be used as the object identifier.
Starting address of the function that the OID identifies.