Using ActiveX in SAS graphics provides users with more functionality, options, and pretty colors than Jpeg, gif, etc (check out these examples). The issue is that ActiveX requires a device driver installed on the viewing machine, similar to Flash. In SAS 9.2, the sasgraph.exe is available within the SASWEB component deployed on the web application server. Therefore all that is required is the use of the codebase option.
In SAS Stored Processes, using this codebase option can be implemented via the ods html body no_top_matter and no_bottom_matter mechanisms. I've used this method since '05 (probably a reason I started the blog), check out the oldie but goodie: https://blogs.sas.com/content/bi/2005/10/14/converting-sasintrnet-into-sas-stored-processes/
Another option is to specify the codebase= option within the SAS Stored Process Macro '_ODSOptions'.
My recommendation is to include the following two lines before the %stpbegin;
%global _odsoptions;
%let _odsoptions=codebase="/sasweb/graph/sasgraph.exe";
Then you can utilize the goptions device=activex; setting.
Any users who do not have the appropriate driver will be prompted to install it.