Hi,
Serve your HTML code by placing it in the LevN/Web/WebServer/htdocs directory of your SAS configuration. You will then be able to embed it via an iframe.
Alternatively if you need to have your HTML code output by a stored process, you can use this code:
data _null_;
infile '/somewhere/html_code.html';
file _webout;
put _infile_;
run;
Ensure that you don't have the %stpbegin and %stpend parameters present. See this post if you want to reuse the same stored process for outputting your HTML as well as your data processing.