CryptGetOIDFunctionAddress

[DllImport("Crypt32.dll", SetLastError = true)]
public static extern bool CryptGetOIDFunctionAddress(
   IntPtr hFuncSet,
   uint dwEncodingType,
   IntPtr pszOID,
   uint dwFlags,
   ref IntPtr phFuncAddr,
   ref IntPtr pvFuncAddr,
   ref IntPtr pcbFuncAddr
);

Microsoft documentation: Link