Return wxWinVersion_[78] correctly from wxMSW wxGetWinVersion().

This is especially important because the workaround of r76152 for IFileDialog
bug under Windows Vista also applied under later Windows versions as they were
not detected correctly.

Closes #16286.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76599 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/private.h

@@ -899,6 +899,7 @@ inline wxString wxGetFullModuleName()
 //      0x0502      Windows XP SP2, 2003 SP1
 //      0x0600      Windows Vista, 2008
 //      0x0601      Windows 7
+//      0x0602      Windows 8 (currently also returned for 8.1)
 //
 // for the other Windows versions 0 is currently returned
 enum wxWinVersion
@@ -926,7 +927,9 @@ enum wxWinVersion
     wxWinVersion_Vista = wxWinVersion_6,
     wxWinVersion_NT6 = wxWinVersion_6,
 
-    wxWinVersion_7 = 0x601
+    wxWinVersion_7 = 0x601,
+
+    wxWinVersion_8 = 0x602
 };
 
 WXDLLIMPEXP_BASE wxWinVersion wxGetWinVersion();

src/msw/utils.cpp

@@ -1478,10 +1478,19 @@ wxWinVersion wxGetWinVersion()
                     break;
 
                 case 6:
-                    return wxWinVersion_NT6;
+                    switch ( verMin )
+                    {
+                        case 0:
+                            return wxWinVersion_Vista;
+
+                        case 1:
+                            return wxWinVersion_7;
+
+                        case 2:
+                            return wxWinVersion_8;
                     }
                     break;
-
+            }
         default:
             // Do nothing just to silence GCC warning
             break;