[Newbies] fromString: method

[Davide Arrigo]

Hy all, I worder if there's something like this: Block fromString:
aString in Squeak, like the example below taken from SmallTalk/X
programmers guide.

|s b|

    s := '[:a :b | (a squared + b squared) sqrt ]'.
    b := (Block fromString:s).
    Transcript showCR:(b value:3 value:4)

I need to get a Block of code from an input field  like TextMorph in a
GUI. I haven't found nothing like this in my squeak-dev image 3.10. Is
there another way to obtain am evaluable Block of code from a string?
Many thanks
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Davide Arrigo