GUIX and gx_system_string_get

Hello again,

I still have a problem with GUIX ...
I should get a string value and to do that I understand that I should use gx_system_string_get, but I do not get what I want ...

I created in GUIX a string called LBL_STR that contains "pressure" and is not attached to any widget, there is a way to recall it at runtime and use it where/when necessary? As I said gx_system_string_get returns "strange characters".

Does anyone have an example?

Thanks in advance

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Enzo