Make use of webutil, depends what functionality or specific features you are looking for. if webutil doesnt serve your purpose then you got usage of Java beans, you will find alot and attach java beans to your forms 12c.
Let's take into consideration if you are looking for Windows System Interface routines then yes you can achieve using webutil...
Thanks for response.
I was hoping there was a direct replacement in Forms11/12 webutil for Forms6i f50write.write_block.
Like there was for Forms6 text_io being replaced with Forms11/12 webutil client_text_io.
We can achieve same functionality as Forms6i f50write.write_block by looping through records in block and writing record data to local file using webutil client_text_io.