When  I build my application exe and the XTToolkit DLL using Unicode everything works as expected.

But I'm testing different language combinations to better understand what is going on.

When I build both my application and the XTToolkit Pro using non-Unicode I have problems seeing e.g. simplified Chinese characters in my program. This is of cause expected.

Then I set the manifest file for my exe to include the line:

<activeCodePage xmlns="http://schemas.microsoft.com/SMI/2019/WindowsSettings">UTF-8</activeCodePage>

This makes my exe using the MFC controls able to show the simplified Chinese characters correctly. However the controls used by the XTToolkit don't shot the text as UTF-8. 

See the example above, where a simple MFC dialog belonging to my exe shows the text correctly, but the XTPGrid display the same text incorrectly.

So, what is the problem?

How do I tell the XTToolkit DLL to use UTF-8?

Do I need to set the same manifest for the XTPToolkit DLL I build?

Do I need to set something like this?

XTPResourceManager()->GetLanguageInfo()->nCodePage

It seems that adding the manifest to the XTToolkit DLL does not make a difference ?

But, enabling the "Beta: Use Unicode UTF-8  for worldwide language support" regional settings feature in Windows 10/11 solves the problem in the XTToolkit controls. So the question is then, how do I enable this programmatically or through a manifest for the XTToolkit DLL controls?

Any Ideas?

GDI doesn't currently support setting the ActiveCodePage property per process. Instead, GDI defaults to the active system codepage. To configure your app to render UTF-8 text via GDI, go to Windows Settings > Time & language > Language & region > Administrative language settings > Change system locale, and check Beta: Use Unicode UTF-8 for worldwide language support. Then reboot the PC for the change to take effect.