Method do_unregister

diff_ext_for_kdiff3/server.cpp:382–428

}

HRESULT
SERVER::do_unregister() {
   LOG();
  TCHAR class_id[MAX_PATH];
  LPWSTR tmp_guid;
  HRESULT ret = SELFREG_E_CLASS;

  if (StringFromIID(CLSID_DIFF_EXT, &tmp_guid) == S_OK) {
    _tcsncpy(class_id, tmp_guid, MAX_PATH);

    CoTaskMemFree((void*)tmp_guid);

    LRESULT result = NOERROR;
    TCHAR subkey[MAX_PATH];

    REGSTRUCT entry[] = {
      {TEXT("Software\\Classes\\CLSID\\%s\\InProcServer32"), nullptr, nullptr},
      {TEXT("Software\\Classes\\CLSID\\%s"), nullptr, nullptr}
    };

    for(unsigned int i = 0; (i < sizeof(entry)/sizeof(entry[0])) && (result == NOERROR); i++) {
      _stprintf(subkey, entry[i].subkey, class_id);
      result = RegDeleteKey(HKEY_CURRENT_USER, subkey);
    }

    if(result == NOERROR) {
      result = RegDeleteKey(HKEY_CURRENT_USER, TEXT("Software\\Classes\\*\\shellex\\ContextMenuHandlers\\kdiff3ext"));

      if(result == NOERROR) {
        // NT needs to have shell extensions "approved".
         HKEY key;

         RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Shell Extensions\\Approved"), 0, KEY_ALL_ACCESS, &key);

         result = RegDeleteValue(key, class_id);

         RegCloseKey(key);

         if(result == ERROR_SUCCESS) {
         ret = S_OK;
         }
      }
    }
  }

  return ret;
}