Update HMCLauncher (#2264)

* 更新 lang.h

* 更新 main.cpp

* 更新 HMCLauncher.sh

HMCLauncher/HMCL/main.cpp

@@ -3,6 +3,7 @@
 #include "os.h"
 #include "java.h"
 #include "lang.h"
+#include <windows.h>
 
 Version J8(TEXT("8"));
 
@@ -49,6 +50,10 @@ void FindJavaInDirAndLaunchJVM(const std::wstring &baseDir, const std::wstring &
   }
 }
 
+void OpenHelpPage() {
+    ShellExecute(0, 0, L"https://docs.hmcl.net/help.html", 0, 0, SW_SHOW);
+}
+
 int APIENTRY wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                       LPWSTR lpCmdLine, int nCmdShow) {
   std::wstring path, exeName, jvmOptions;