Win32 macOS like systembar experiment

systembar.c

#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#define UPDATE_TIMER 1

int barHeight = 32;
COLORREF backgroundColor = RGB(142, 68, 173);
COLORREF fontColor = RGB(255, 255, 255);
char *fontName = "Segoe UI";
int fontSize = 19;
int padding = 12;

HFONT font;
HFONT fontBold;
HWND activeWindow = NULL;

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
    if (msg == WM_CREATE) {
        font = CreateFont(fontSize, 0, 0, 0, FW_NORMAL, 0, 0, 0, 0, 0, 0, CLEARTYPE_QUALITY, 0, fontName);
        fontBold = CreateFont(fontSize, 0, 0, 0, FW_BOLD, 0, 0, 0, 0, 0, 0, CLEARTYPE_QUALITY, 0, fontName);

        SetTimer(hwnd, UPDATE_TIMER, 100, NULL);
        return 0;
    }

    if (msg == WM_TIMER) {
        if (wParam == UPDATE_TIMER) {
           activeWindow = GetForegroundWindow();
           InvalidateRect(hwnd, NULL, TRUE);
        }
    }

    if (msg == WM_PAINT) {
        PAINTSTRUCT ps;
        HDC hdc = BeginPaint(hwnd, &ps);

        SetTextColor(hdc, fontColor);
        SetBkMode(hdc, TRANSPARENT);

        RECT windowRect;
        GetClientRect(hwnd, &windowRect);

        if (activeWindow != NULL) {
            char title[MAX_PATH];

            /*DWORD dwProcId = 0;

            GetWindowThreadProcessId(activeWindow, &dwProcId);

            HANDLE hProc = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ , FALSE, dwProcId);
            GetModuleFileName((HMODULE)hProc, title, MAX_PATH);
            CloseHandle(hProc);*/

            GetWindowText(activeWindow, &title, sizeof(title));

            SelectObject(hdc, fontBold);

            SIZE titleSize;
            GetTextExtentPoint32(hdc, title, strlen(title), &titleSize);
            if (titleSize.cx > 256) titleSize.cx = 256;

            RECT titleRect = {
                padding,
                0,
                padding + titleSize.cx,
                windowRect.bottom
            };
            DrawText(hdc, title, -1, &titleRect, DT_LEFT | DT_SINGLELINE | DT_VCENTER | DT_END_ELLIPSIS);

            HMENU menu = GetMenu(activeWindow);

            int x = padding + titleSize.cx + padding;

            SelectObject(hdc, font);

            for (int i = 0; i < GetMenuItemCount(menu); i++) {
                char menuItem[200];
                GetMenuStringA(menu, i, &menuItem, sizeof(menuItem), MF_BYPOSITION);

                SIZE size;
                GetTextExtentPoint32(hdc, menuItem, strlen(menuItem), &size);


                RECT menuItemRect = {
                    x,
                    0,
                    x + size.cx,
                    windowRect.bottom
                };
                DrawText(hdc, menuItem, -1, &menuItemRect, DT_LEFT | DT_SINGLELINE | DT_VCENTER);

                x += size.cx + padding / 2;
            }

        }

        SelectObject(hdc, font);

        char buf[100];
        SYSTEMTIME st;
        GetLocalTime(&st);
        wsprintf(buf, "%02u:%02u:%02u", st.wHour, st.wMinute, st.wSecond);
        RECT timeRect = {
            0,
            0,
            windowRect.right - 8,
            windowRect.bottom
        };
        DrawText(hdc, buf, -1, &timeRect, DT_RIGHT | DT_SINGLELINE | DT_VCENTER);

        EndPaint(hwnd, &ps);
        return 0;
    }

    if (msg == WM_DESTROY) {
        DeleteObject(fontBold);
        DeleteObject(font);
        PostQuitMessage(0);
        return 0;
    }

    return DefWindowProc(hwnd, msg, wParam, lParam);
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    WNDCLASSEX wc;
    wc.cbSize        = sizeof(WNDCLASSEX);
    wc.style         = 0;
    wc.lpfnWndProc   = WndProc;
    wc.cbClsExtra    = 0;
    wc.cbWndExtra    = 0;
    wc.hInstance     = hInstance;
    wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = CreateSolidBrush(backgroundColor);
    wc.lpszMenuName  = NULL;
    wc.lpszClassName = "systembar";
    wc.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);
    RegisterClassEx(&wc);

    HWND hwnd = CreateWindowEx(WS_EX_TOPMOST | WS_EX_NOACTIVATE, wc.lpszClassName, "Systembar", WS_POPUP,
        0, 0, GetSystemMetrics(SM_CXSCREEN), barHeight, NULL, NULL, hInstance, NULL);
    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0) > 0) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}