?????????? ?? ????????? ???? ????? C++ ?? ????? ?? ??? ????? ?? ???????? ???? ?? Windows XP ????????? ????? ?? ??? ???? ????

• ?? Win32 ????????? ??????
• ????? ????? ??? ??? ?????????? ?? ??? ?????????????? ??..
• ???? ?? ????? ????????? ??????????? ????? ?? ??? ????? ?? ??????? ???
• ??? ????? ?????? ?? ????? ?? ???? ?????
• ?????????? ?? ????? ??? ??? ?????
• ?????????? ?? ????? ??? ?? ???? ?????

• ????????? ???? classify ???
• ????????? ???? ?? ??? ????? ?? ?????? ?????
• ????????? judiciously ?? ????? ?????

????? ?? ???? ????

??????????

• Windows XP Home ??????? ?? Windows XP Professional
• ????? Studio 2008, ????? Sudio 2005 ?? Visual Studio .NET.
• Win32 ????????? ????? ?? ????? ???????

????? ?? ???? ????

?? Win32 ????????? ?????

• Visual Studio .NET, ??? ????? ????????? C++ ??????????? ???????????????? ???????? ????-????? ????, ?? ???? ???Win32 ??????????? ???????????????. ????????? ????? ???????? ????????? ???? ?? ?? ??????? ????????? ???????? ??????? ?????
• Visual Studio 2005 ?? 2008, ??? ????? ????????? C++?? ???????????????? ???????? ????-????? ????, ?? ???? ???Win32 ??????????? ???????????????. ??????? ????????? ???????? ??????? ?????

????? ?? ???? ????

????? ???? ?? ' ?????? ?? ??? ??? ?????? ???? ?? ?????

1. ????? ????,?????? ?????????? ????, ?? ???? ???IDC_SAVINGDATA.
2. ????? ????? ??? ??? ?????????? ?? ??? ?????? ???????????? ??.. ?????IDM_FILE_SAVEAS?? ??? ??? ???? ???? ?? ID.
3. ????????? ?? ?????? ?????WndProcSavingData.cppm ??? ????? ????????? ?? ??? ??? ???????????????????? ??? ?? ????WM_COMMAND????????? ???? ?? ??? ???????? ??? ??? ?????????? ?? ??????? ???OnFileSaveAs??????, ?? ???? ?????? ??? ??? ????? ?? ?????? ??? ???????? ???? ???
   
   ???? ??? ?? ??? ??? ????? ???? ?????:

   case WM_COMMAND:
       wmId    = LOWORD(wParam);
       wmEvent = HIWORD(wParam);
       // Parse the menu selections:
       switch (wmId)
       {
       case IDM_ABOUT:
           DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
           break;
       case IDM_EXIT:
           DestroyWindow(hWnd);
           break;
       case IDM_FILE_SAVEAS:
           OnFileSaveAs(hWnd);
           break;
       default:
           return DefWindowProc(hWnd, message, wParam, lParam);
       }
       break;
   

????? ?? ???? ????

??? ????? ?? ??? ???? ???? ?????? ????? ????? ??? ??????? ?? ????? ????

1. SavingData.cpp ?? ????? ?? ????? ????? ????? ??????:

   #include <commdlg.h>   // for GetSaveFileName
   #include <shlobj.h>    // for SHGetFolderPath
   					

2. ?? ??? ????? ?????????? ??????OnFileSaveAs?????? ?? ??? ???? ???.:

   void OnFileSaveAs( HWND hWnd );
   					

3. ??? ?????OnFileSaveAs?????? ?? ??? ???? ???.. ?? ?????? ?? ?????SHGetFolderPath??? ??? ??????CSIDL_MYPICTURESCSIDL?????????? ?? ???????? ???? ?? ??? ??? ??????? ????? ??????? ???? ?? ??? ???? ?????? ?? ??????? ?? ???? ?? ??? ????? ?? ???GetSaveFileName???? ????????? ???? ?? ??? ??????????? ??????????? ????? ?? ??????? ?? ??? ?? ..
   
   ???? ??? ?? ??? ??? ????? ???? ?????:

   void OnFileSaveAs(HWND hWnd)
   {
      OPENFILENAME openFile;
      TCHAR szPath[MAX_PATH];
      TCHAR szFile[MAX_PATH];
   
       // Initialize OPENFILENAME structure.
       ZeroMemory( &openFile, sizeof(OPENFILENAME) );
       openFile.lStructSize = sizeof(OPENFILENAME);
   
       szFile[0] = '\0';
       openFile.hwndOwner = hWnd;
       openFile.lpstrFile = szFile;
       openFile.nMaxFile = sizeof(szFile)/sizeof(*szFile);
   
       // Default to My Pictures. First, get its path.
       if ( SUCCEEDED( SHGetFolderPath( NULL, CSIDL_MYPICTURES, 
                                             NULL, 0, szPath ) ) )
       {
          // Set lpstrInitialDir to the path that SHGetFolderPath obtains. 
          // This causes GetSaveFileName to point to the My Pictures folder.
             openFile.lpstrInitialDir = szPath;
       }
       // Display the standard File Save dialog box, defaulting to My Pictures.
       if ( GetSaveFileName( &openFile ) == TRUE )
       {
           // User clicks the Save button.
           // Save the file
       }
       else
       {
          // User cancels the File Save dialog box.
       }
   }
   

????? ?? ???? ????

??????? ???? ?????? ????? ?? ???? ????

1. ????????? ????? ?? ??? F5 ????? ??????
2. ????? ????, ?? ????????? ??????? ??? ??? ???????????????? ??..
3. ?????? ???? ?? ????????? ??????????? ???? ?? ??? ???? ????? ?????? ??????? ?? ??? ??? ?????CSIDL_MYPICTURES????????? ???? ???
4. ????? ????,???? ????????? ????? ??? ????, ?? ????????? ??? ?????

????? ?? ???? ????

???????? ????? ??? ??? ????

1. ????? ???static BOOLvariable namedbFirstSave?????OnFileSaveAsfunction, and initialize it toTrue.
2. Modify the code withinOnFileSaveAsto callSHGetFolderPath?? ??? ????lpstrInitialDir?? ?????OPENFILENAMEstructure, only ifbFirstSave??True.
3. If the user clicks???????????????? ??????dialog box, setbFirstSave???? ?? ??????.
   
   Your code should appear as follows:

   void OnFileSaveAs(HWND hWnd)
   {
       OPENFILENAME openFile;
       TCHAR szPath[MAX_PATH];
       TCHAR szFile[MAX_PATH];
       static BOOL bFirstSave = TRUE;
   
       // Initialize OPENFILENAME structure.
       ZeroMemory( &openFile, sizeof(OPENFILENAME) );
       openFile.lStructSize = sizeof(OPENFILENAME);
   
       szFile[0] = '\0';
       openFile.hwndOwner = hWnd;
       openFile.lpstrFile = szFile;
       openFile.nMaxFile = sizeof(szFile)/sizeof(*szFile);
   
       // The first time the user saves a document, default to My Pictures.
       if ( TRUE == bFirstSave )
       {
           if ( SUCCEEDED( SHGetFolderPath( NULL, CSIDL_MYPICTURES, 
               NULL, 0, szPath ) ) )
           {
               // Set lpstrInitialDir to the path that SHGetFolderPath obtains.
               // This causes GetSaveFileName to point to the My Pictures folder.
               openFile.lpstrInitialDir = szPath;
           }
       }
       // Display standard File Save dialog box, defaulting to My Pictures
       // or the user's previously selected location.
       if ( GetSaveFileName( &openFile ) == TRUE )
       {
           // User clicks Save.
           // Save the file.
           bFirstSave = FALSE;
       }
       else
       {
           // User cancels the File Save dialog box.
       }
   }
   

????? ?? ???? ????

Verify the User's Previous Selection

1. Build the project, and run the application.
2. ?????????? ??,?? ??? ??? ??????.
3. Browse from the My Pictures folder to the My Documents folder, select a file, and click??????.
4. ?????????? ??,?? ??? ??? ?????????:?
5. Verify that the dialog box defaults to your previous selection (in this case, My Documents).
6. ????? ????,???? ????to dismiss the dialog box, and close the application.
7. Run the application, and click?? ??? ??? ???????????????? ??..
8. Verify that the dialog box defaults back to the My Pictures folder.
9. Close the dialog box, and quit the application.

????? ?? ???? ????

Classify Application Data

• ???????? ?????????? (??????) ?? ???: ?????? ?? ????????? ???? ?? ???? ????? ?????????? ?? ??? ??????? ?? ?? ???? ????? ?????? ???? ?? ??? ?????????? ?? ??? ??? ?? ???? ?? ?? (?????? ?? ???, ??? ????? ???????) ???? ????? ??? ???????? ?? ??? ?? ????? ???? ??? ????? ??? ?? ?? ?????? ???? ???? ???? ?? ??? ????????? ?? ???? ????? ?? ??????? ??? ????? ?? ??? ??????? ???? ???? ??? ????
• ???????? ?????????? (???-??????) ?? ???: ?????? ?? ????? ???? ?? ?? ????????? ???? ?? ???? ????? ?????????? ?? ??? ??????? ??, ????? ???? ??? ??? ???????? (?????? ?? ???, ???? ?????????? ????????? ?????? ???????????) ?? ???? ???? ???
• ???????? ???????? (???-??????????-??????? ?? ???-??????) ?? ???: ?????? ?? ?? ???? ???? ?? (?????? ?? ???, ??? ????????? ???????, ?? ??? ?????, ?? ???? ??????? ?????) ??? ????? ???????? ?? ??? ?? ??? ???????????? ?? ??? ????????? ???? ?? ????? ???? ???

????? ?? ???? ????

????????? ???? ?????? ????? ???????

• For each user (roaming) data, use theCSIDL_APPDATAValue:. This defaults to the following path:
  \Documents and Settings\?????????? ?? ???>\Application Data
• For each user (non-roaming) data, use theCSIDL_LOCAL_APPDATAValue:. This defaults to the following path:
  \Documents and Settings\?????????? ?? ???>\Local Settings\Application Data
• For each computer (non-user specific and non-roaming) data, use theCSIDL_COMMON_APPDATAValue:. This defaults to the following path:
  \Documents and Settings\All Users\Application Data

include <shlwapi.h>
#pragma comment(lib,"shlwapi.lib")
void CreateTemporaryFile()
{
   TCHAR szPath[MAX_PATH];
   // Get path for each computer, non-user specific and non-roaming data.
   if ( SUCCEEDED( SHGetFolderPath( NULL, CSIDL_COMMON_APPDATA, 
                                    NULL, 0, szPath ) ) )
   {
      TCHAR szTempFileName[MAX_PATH];
      // Append product-specific path - this path needs to already exist
      // for GetTempFileName to succeed.
      PathAppend( szPath, _T("\\My Company\\My Product\\1.0\\") );
      // Generate a temporary file name within this folder.
      if (GetTempFileName( szPath, 
                           _T("PRE"),
                           0,
                           szTempFileName ) != 0 )
      {
         HANDLE hFile = NULL;
         // Open the file.
         if (( hFile = CreateFile( szTempFileName, 
                                   GENERIC_WRITE, 
                                   0, 
                                   NULL, 
                                   CREATE_ALWAYS, 
                                   FILE_ATTRIBUTE_NORMAL, 
                                   NULL )) != INVALID_HANDLE_VALUE )
         {
            // Write temporary data (code omitted).
            CloseHandle( hFile );
         }
      }
      else
          DWORD err = GetLastError();
   }
}

????? ?? ???? ????

Use the Registry Judiciously

• For small amounts of user data, use theHKEY_CURRENT_USER(HKCU) registry key.
• For small amounts of computer data, use theHKEY_LOCAL_MACHINE(HKLM) registry key. Your application should not write toHKLMat run time because, by default, non-administrator users only have read-only access to theHKLM?????
• At installation time, your application must not store more than a total of 128 KB acrossHKCU, ??HKLM.
• Component Object Model (COM) components are registered beneath theHKEY_CLASSES_ROOT(HKCR) registry key. The 128 KB maximum does not includeHKCR.
• When you write toHKLM??,HKCU, you must create keys for the company name, product name, and product version number, as follows:
  HKLM\Software\Company Name\Product Name\Product Version
  HKCU\Software\Company Name\Product Name\Product Version
• Use the registry functions (such asRegCreateKeyEx, ??RegSetValueEx) to read and write registry entries.

????? ?? ???? ????

?????? ??????

• To help ensure that applications run on earlier versions of Windows in addition to Windows XP, always link to theSHGetFolderPathimplementation in Shfolder.dll. Although Windows XP includesSHGetFolderPathin Shell32.dll, earlier versions of Windows may not support the function within this dynamic-link library (DLL).
• Shfolder.dll is a redistributable component and may be distributed with your applications.
• Do not store fully-qualified paths to the My Documents folder (or other system folders) within an application-specific place such as a file list of most recently used files because a user or Administrator may relocate these folders between successive uses of your application.

????? ?? ???? ????