Update to 7-Zip Version 22.00

See: https://sourceforge.net/p/sevenzip/discussion/45797/thread/9c2d9061ce/

CPP/7zip/UI/FileManager/HelpUtils.cpp

@@ -12,7 +12,20 @@ void ShowHelpWindow(LPCSTR)
 
 #else
 
+// #define USE_EXTERNAL_HELP
+
+#if defined(_MSC_VER)
+#endif
+
+#ifdef USE_EXTERNAL_HELP
+
+#include "../../../Windows/ProcessUtils.h"
+#include "../../../Windows/FileDir.h"
+#include "../../../Windows/FileName.h"
+
+#else
 #include <HtmlHelp.h>
+#endif
 
 #include "../../../Common/StringConvert.h"
 
@@ -25,8 +38,37 @@ void ShowHelpWindow(LPCSTR topicFile)
   FString path = NWindows::NDLL::GetModuleDirPrefix();
   path += kHelpFileName;
   path += topicFile;
+ #ifdef USE_EXTERNAL_HELP
+  FString prog;
+
+  #ifdef UNDER_CE
+    prog = "\\Windows\\";
+  #else
+    if (!NWindows::NFile::NDir::GetWindowsDir(prog))
+      return;
+    NWindows::NFile::NName::NormalizeDirPathPrefix(prog);
+  #endif
+  prog += "hh.exe";
+
+  UString params;
+  params += '"';
+  params += fs2us(path);
+  params += '"';
+
+  NWindows::CProcess process;
+  const WRes wres = process.Create(fs2us(prog), params, NULL); // curDir);
+  if (wres != 0)
+  {
+    /*
+    HRESULT hres = HRESULT_FROM_WIN32(wres);
+    ErrorMessageHRESULT(hres, imageName);
+    return hres;
+    */
+  }
+ #else
   // HWND hwnd = NULL;
   HtmlHelp(NULL, GetSystemString(fs2us(path)), HH_DISPLAY_TOPIC, 0);
+ #endif
 }
 
 #endif