diff --git a/interface/wx/platinfo.h b/interface/wx/platinfo.h
index b32f810f0c..b27a2a6f32 100644
--- a/interface/wx/platinfo.h
+++ b/interface/wx/platinfo.h
@@ -12,7 +12,12 @@
     whose version can be detected at run-time.
 
     The values of the constants are chosen so that they can be combined as flags;
-    this allows to check for operating system families like e.g. wxOS_MAC and wxOS_UNIX.
+    this allows to check for operating system families like e.g. @c wxOS_MAC and @c wxOS_UNIX.
+    
+    Note that you can obtain more detailed informations about the current OS
+    version in use by checking the major and minor version numbers returned
+    by ::wxGetOsVersion() or by wxPlatformInfo::GetOSMajorVersion(), 
+    wxPlatformInfo::GetOSMinorVersion().
 */
 enum wxOperatingSystemId
 {
@@ -20,12 +25,16 @@ enum wxOperatingSystemId
 
     wxOS_MAC_OS         = 1 << 0,     //!< Apple Mac OS 8/9/X with Mac paths
     wxOS_MAC_OSX_DARWIN = 1 << 1,     //!< Apple Mac OS X with Unix paths
+    
+    //! A combination of all @c wxOS_MAC_* values previously listed.
     wxOS_MAC = wxOS_MAC_OS|wxOS_MAC_OSX_DARWIN,
 
     wxOS_WINDOWS_9X     = 1 << 2,     //!< Windows 9x family (95/98/ME)
-    wxOS_WINDOWS_NT     = 1 << 3,     //!< Windows NT family (NT/2000/XP)
+    wxOS_WINDOWS_NT     = 1 << 3,     //!< Windows NT family (NT/2000/XP/Vista/7)
     wxOS_WINDOWS_MICRO  = 1 << 4,     //!< MicroWindows
     wxOS_WINDOWS_CE     = 1 << 5,     //!< Windows CE (Window Mobile)
+    
+    //! A combination of all @c wxOS_WINDOWS_* values previously listed.
     wxOS_WINDOWS = wxOS_WINDOWS_9X       |
                     wxOS_WINDOWS_NT      |
                     wxOS_WINDOWS_MICRO   |
@@ -38,6 +47,8 @@ enum wxOperatingSystemId
     wxOS_UNIX_SOLARIS   = 1 << 10,      //!< SunOS
     wxOS_UNIX_AIX       = 1 << 11,      //!< AIX
     wxOS_UNIX_HPUX      = 1 << 12,      //!< HP/UX
+    
+    //! A combination of all @c wxOS_UNIX_* values previously listed.
     wxOS_UNIX = wxOS_UNIX_LINUX     |
                 wxOS_UNIX_FREEBSD   |
                 wxOS_UNIX_OPENBSD   |
@@ -354,6 +365,8 @@ public:
 
     /**
         Returns the operating system ID of this wxPlatformInfo instance.
+        
+        See wxGetOsVersion() for more info.
     */
     wxOperatingSystemId GetOperatingSystemId() const;
     
diff --git a/interface/wx/utils.h b/interface/wx/utils.h
index 9bb227a63d..490cf53f61 100644
--- a/interface/wx/utils.h
+++ b/interface/wx/utils.h
@@ -649,8 +649,34 @@ bool wxGetUserName(char* buf, int sz);
 wxString wxGetOsDescription();
 
 /**
-    Gets the version and the operating system ID for currently running OS. See
-    wxPlatformInfo for more details about wxOperatingSystemId.
+    Gets the version and the operating system ID for currently running OS. 
+    The returned wxOperatingSystemId value can be used for a basic categorization
+    of the OS family; the major and minor version numbers allows to detect a specific
+    system.
+    
+    For Unix-like systems (@c wxOS_UNIX) the major and minor version integers will 
+    contain the kernel major and minor version numbers (as returned by the
+    'uname -r' command); e.g. "2" and "6" if the machine is using kernel 2.6.19.
+
+    For Mac OS X systems (@c wxOS_MAC) the major and minor version integers are the
+    natural version numbers associated with the OS; e.g. "10" and and "6" if the machine
+    is using Mac OS X Snow Leopard.    
+    
+    For Windows-like systems (@c wxOS_WINDOWS) the major and minor version integers will 
+    contain the following values:
+    @beginTable
+    @row3col{<b>Windows OS name</b>, <b>Major version</b>, <b>Minor version</b>}
+    @row3col{Windows 7,                 6, 1}
+    @row3col{Windows Server 2008 R2,    6, 1}
+    @row3col{Windows Server 2008,       6, 0}
+    @row3col{Windows Vista,             6, 0}
+    @row3col{Windows Server 2003 R2,    5, 2}
+    @row3col{Windows Server 2003,       5, 2}
+    @row3col{Windows XP,                5, 1}
+    @row3col{Windows 2000,              5, 0}
+    @endDefList
+    See the <a href="http://msdn.microsoft.com/en-us/library/ms724832(VS.85).aspx">MSDN</a>
+    for more info about the values above.
 
     @see wxGetOsDescription(), wxPlatformInfo