Use wmain() if supported by the compiler/CRT instead of main().

This avoids a needless conversion from (originally Unicode) command line to
ANSI by the CRT and conversion back by wxWidgets and, especially, ensures that
there is no data loss if the Unicode command line arguments can't be converted
into the current charset.

See #14580.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72402 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/app.h

@@ -766,6 +766,18 @@ public:
 // your compiler really, really wants main() to be in your main program (e.g.
 // hello.cpp). Now wxIMPLEMENT_APP should add this code if required.
 
+// For compilers that support it, prefer to use wmain() as this ensures any
+// Unicode strings can be passed as command line parameters and not just those
+// representable in the current locale.
+#if wxUSE_UNICODE && defined(__VISUALC__)
+    #define wxIMPLEMENT_WXWIN_MAIN_CONSOLE                                    \
+        int wmain(int argc, wchar_t **argv)                                   \
+        {                                                                     \
+            wxDISABLE_DEBUG_SUPPORT();                                        \
+                                                                              \
+            return wxEntry(argc, argv);                                       \
+        }
+#else // Use standard main()
     #define wxIMPLEMENT_WXWIN_MAIN_CONSOLE                                    \
         int main(int argc, char **argv)                                       \
         {                                                                     \
@@ -773,6 +785,7 @@ public:
                                                                               \
             return wxEntry(argc, argv);                                       \
         }
+#endif
 
 // port-specific header could have defined it already in some special way
 #ifndef wxIMPLEMENT_WXWIN_MAIN