I'm write application to control FiscalPrinter that have own library for it.

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GAMBAS3 code:

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But in log of the library you will see additional symbols after end of strings.

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Sometime parameter ever don't transfer to external library.

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As result FiscalPrinter not recognize that commands.
What I do wrong?

I don't know the answer, but I think you need to look at WCHAR_T. This is a Microsoft speciality. Does it need to be there, or should it be in lower case?

Did you mean to change "WCHAR_T" to "wchar_t"?

dmg244 said

Did you mean to change "WCHAR_T" to "wchar_t"?

Maybe. Try it.

Same result. I think converter to wchar_t work incorrect. Because every time when I run programm output resultate is different.

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In Python it's working without problem as you can see.