Ability to return the version of Python launcher running

PC/launcher2.c

@@ -407,6 +407,8 @@ typedef struct {
     bool listPaths;
     // if true, display help message before contiuning
     bool help;
+    // if true, display Python Launcher version before contiuning
+    bool version;
     // dynamically allocated buffers to free later
     struct _SearchInfoBuffer *_buffer;
 } SearchInfo;
@@ -647,6 +649,8 @@ parseCommandLine(SearchInfo *search)
                 search->help = true;
                 // Do not update restOfCmdLine so that we trigger the help
                 // message from whichever interpreter we select
+            } else if (STARTSWITH(L"V") || STARTSWITH(L"-version")) {
+                search->version = true;
             }
         }
     }
@@ -2464,6 +2468,11 @@ process(int argc, wchar_t ** argv)
         }
     }
 
+    if (search.version) {
+        fwprintf(stdout, L"Python launcher for Windows %S\n", PY_VERSION);
+        fflush(stdout);
+    }
+
     // Select best environment
     // This is early so that we can show the default when listing, but all
     // responses to any errors occur later.