Windows Longhorn build 4059

Windows Longhorn build 4059 is a build of Windows Longhorn, the reference of this build was found in the  file, located within the reference source code for the .NET 4.5.1 version of Windows Presentation Foundation. It mentions that builds after 4059 always display the view header regardless of the view mode being used in Explorer. This is consistent with the behaviour shown in later builds of Longhorn.

Extract from the file referencing the build
// detect if listview is in detail mode static internal bool IsDetailMode (IntPtr hwnd) {   int view = ListViewGetView (hwnd);

// Current LH builds (4059) display the header even in tile view, // which makes us think we are in details view. // Explicitly detect tile view and return false. if (view == NativeMethods.LV_VIEW_TILE) {           return false; }

if (InReportView(hwnd) || (view == NativeMethods.LV_VIEW_DETAILS)) {           return true; }