[frik]

If you would prefer "native UI", then you would hate Visual Studio as well. Visual Studio 6 (1998) was the last one which used Win32 API for the UI. Visual Studio.net (aka 2002) already had this non-standard UI controls. Even Eclipse is more "native UI" than Visual Studio, as Eclipse UI is rendered by Win32API and uses common controls. VS uses WPF and they switched to an non-native-look skin starting with Visual Studio 2013.

Btw. even Office uses non-native UI controls since the very beginning of Office programs around 1990. You can see this if you open Word 6 in Win95 (or later), the controls and even child-window theme looks like Win3.1. Office 97 had a very visible non-standard window theme with the application title in italic font (no other Win95 app looks like that). The menu bar of Office 1997 and later looks non-standard as well. Office 2007 and later draw a custom drawn ribbon area over the Win32 menu. With COM you can integrate a Word/Excel/etc document area in your sample Win32 application and you can watch how the traditional nativ menu bar is overdrawn by a ribbon area if you click inside the document area.