Junk characters issue when trying to read Thai resources (.rc) in Windows App

I understand that for my app to work I need to used ANSI encoding with codepage 874

How do you know that?

We are using ANSI based rc files in this project.

Try using Unicode.

According to my test, the project using Unicode Character Set and the text saved in Unicode make the UI work fine. Texts in .rc files work for UTF-8 with BOM and UTF-16 LE operating in Windows notepad.

   TCHAR t[] = L"สวัสดีค่ะทุกคน";
   HWND hWnd = CreateWindow(szWindowClass, szTitle/*t*/, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);