I’m programming a library which will make setting colors, modes, etc. easier in console program. But I’ve encountered a problem with Windows Terminal. For example I have a function:

void WindowsCLI::setUnderlinedFont()
{
    auto consoleHandle = GetStdHandle(STD_OUTPUT_HANDLE);
    config.underlined = true;
    SetConsoleTextAttribute(consoleHandle, getTextAttribute(config));
}

and it uses COMMON_LVB_UNDERSCORE attribute from windows.h to make text underlined. And the result of this function in powershell looks like this:
, and in Windows Terminal like this:, so apparently in the second case my function didn’t work properly. I thought that the problem is that the Windows Terminal runs in virtual terminal mode. So I made another function for virtual terminals:

void WindowsVirtualCLI::setUnderlinedFont()
{
    printf("\x1b[4m");
}

and now it didn’t work for Powershell: , and worked properly for Windows Terminal: . But now I have another problem. How to distinguish that the program is run in Powershell or Windows Terminal. I tried using this function:

CLI& cli()
{
    DWORD consoleMode;
    auto consoleHandle = GetStdHandle(STD_INPUT_HANDLE);
    GetConsoleMode(consoleHandle, &consoleMode);

    if ((consoleMode & ENABLE_PROCESSED_OUTPUT) && (consoleMode & ENABLE_VIRTUAL_TERMINAL_PROCESSING))
    {
        return windows::WindowsVirtualCLI::getInstance();
    }
    else
    {
        return windows::WindowsCLI::getInstance();
    }
}

But it turned out that both Powershell and Windows Terminal have ENABLE_PROCESSED_OUTPUT and ENABLE_VIRTUAL_TERMINAL_PROCESSING enabled. And now, I have no other idea how can I distinguish these terminals in runtime. Do you have any idea how?