Windows NT 3.1 build 260

Windows NT 3.1 build 1.260 is an unleaked build of Windows NT 3.1, mentioned in the file  from the Windows NT 4.0 source code.

// Try SendNotifyMessage in build 260 or later - kills earlier builds //   SendNotifyMessage ((HWND)-1, WM_WININICHANGE, 0L, (LONG)lpSection); //   PostMessage ((HWND)-1, WM_WININICHANGE, 0L, (LONG)lpSection); // [stevecat] 4/4/92