Presenting a conformation screen...

I am of the idea that the readonly mode should ALWAYS output the inputs in invisible fields. If you are not going to use them they do not affect you...

For now, I think I'll end up changing the individual readonly parameters using the SetInputProperty. And for the "modify" button I think I'll have to use some javascript to change a value in an invisible field so that the form knows if the user intends to confirm and process the form or modifying it.

The form wide ReadOnly flag works as described. I will not break backwards compatibility and change its behavior to not break existing applications and annoy all developers that relied on that behavior.

I you just want to display fields in read-only mode while passing their values in hidden fields, you can just use AddInpuReadOnlyPart. You do not need to set the form wide ReadOnly flag.