Get Windows 10 Theme Color In Classic C++ WinAPI (Win32) Application

I was searching how to get system theme color. I found GetSysColor and GetSysColorBrush. Then I tested it with something like that:

    cout << GetSysColorBrush(COLOR_HIGHLIGHT) << endl; //checking the value if it's changing when 
                                                                   //changing system color

    WNDCLASSW wc = {0};
    wc.hbrBackground = GetSysColorBrush(COLOR_HIGHLIGHT);
    wc.hCursor = LoadCursorA(NULL, IDC_ARROW);
    wc.hInstance = hInst;
    wc.lpfnWndProc = WindowProc;
    wc.lpszClassName = L"WindowClass";

    if(!RegisterClassW(&wc)) return -1;

    CreateWindowW(L"WindowClass", L"Window Name", WS_VISIBLE | WS_POPUP, 0, 0, windowWidth - 500, 
                                           windowHeight - 500, NULL, NULL, NULL, NULL);

I thought it works, because I had default blue theme and the window was blue (exactly same color), then i changed my theme to green but window was still blue (after restarting program obviously).

And now my question: Is it possible to get current system theme color?

The Windows 10 theme colors are available through the UISettings type. It is available to classic desktop applications as well.

The following code uses C++/WinRT to retrieve the currently selected accent color:

#include <winrt/Windows.UI.ViewManagement.h>

#include <iostream>

using namespace winrt;
using namespace Windows::UI::ViewManagement;

int main()
{
    UISettings const ui_settings {};
    auto const accent_color { ui_settings.GetColorValue(UIColorType::Accent) };

    std::wcout << L"R: " << accent_color.R
               << L" G: " << accent_color.G
               << L" B: " << accent_color.B << std::endl;
}