Win32 code cleanup & improve

Zhao Yuhang

2024-12-07 9286c8b9c23a613f96636b8e2d1391d89cedd199

 examples/mainwindow/mainwindow.qrc

@@ -1,5 +1,6 @@
<RCC>
    <qresource prefix="/">
        <file>dark-style.qss</file>
        <file>light-style.qss</file>
    </qresource>
</RCC>