//代码就不加注释了 一看就懂的了 ^_^  BOOL CXXXXXXXXDlg::PreTranslateMessage(LPMSG lpmsg) {           BOOL bHandleNow = FALSE;  switch (lpmsg->message)  {  case WM_KEYDOWN:          switch (lpmsg->wParam)         {          case VK_F1:            {                 // for F1 popup help documents follow language option                  TCHAR szFilePath[MAX_PATH];                 memset(szFilePath,0x00,MAX_PATH);                 GetModuleFileName(NULL, szFilePath, MAX_PATH);                  (_tcsrchr(szFilePath, _T('\\')))[1] = 0;                TCHAR szPath[256];                 // show the manual by the language ID                 lstrcpy(szPath, _T("help.pdf"));                      wcscat_s(szFilePath,szPath);                 if(PathFileExists(szFilePath))                 {                      ShellExecute(NULL,_T("open"),szFilePath,NULL,NULL,SW_SHOW);                      return TRUE;                 }            }            break;   }   break;    }  return __super::PreTranslateMessage(lpmsg); }

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