When working with uir, if you enter the label in Vietnamese, it is displayed as '?'. Is there a way to solve this phenomenon?

[MinHo_Park]

characters entered = Áp dụng

[RobertoBozzolo]

Try this:

It is possible that you need to choose a different font and/or set some additional setting in the OS to correctly display Vietnamese characters.

[MarcelK]

From the logo I see you're using CVI2020. You can Edit->Project and convert the project to UTF8, then your characters should show up fine.