One reason you might not want to use the wizard, is that it may be missing certain HTML elements. One example is adding a password input textbox. As of August 2019, the wizard doesn’t provide this option.
In the below example, we’re adding a textbox and button combo to initialize later on as a finder. We’re also adding a textbox for a user id, and a corresponding password. We’ll be adding these right before the row where the Post button is, on the OE Order Entry screen.
The code above can be done more elegantly, please excuse it for the sake of illustration purposes!
This is nothing specific to Sage 300c web development, just showing it as an option that can be done.