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Best way to access a formControl (from FormRun or FormDesign) and possible pros and cons

Hi to all,

while browsing and looking for solutions to other problems, I noticed that there is no consensus or a general rule for how to access a formControl on a form.

I have seen solutions like the followings, all basically achieving the same:

FormControl frControl;
FormControl fdControl;

FormRun fr = this.formRun();
FormDesign fd = this.formRun().design();
str cName = formControlStr(MyForm, MyControl);

frControl = fr.control(fr.controlId(cName));
fdControl = fd.controlName(cName);

(Sorry, code looks ugly, but I don't understand how to make it work, markup language or other or mixed font usage do not work...)

What I wrote above might not be 100% syntax correct, depending if we are trying to get a control from a Handler, in a form extension or other, but the point is:

You can access a control on the form both from the FormRun or FormDesign class.

So here my question: is there a preferred solution? If so why?

And if there is not a clear preference, what are possible pros and cons of the two approaches, when making the choice?

I remember something like a form can have multiple designs so accessing through the FormDesign is not 100% safe, but I am not sure if it is something I read or just a false memory. I cannot find anything that helps me sort this doubt.

Thanks to all!

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