Describe: automatic upgrade service VC source code, would like to upgrade the software so a friend reference, it is worth studying.

File list(Click to check if it's the file you need, and recomment it at the bottom):
  AboutDlg.cpp
  AboutDlg.h
  ActionPoints.cpp
  ActionPoints.h
  Actions.h
  AuthenticationDlg.cpp
  AuthenticationDlg.h
  BackUp.cpp
  BackUp.h
  CheckForUpdatesProcess.cpp
  CheckForUpdatesProcess.h
  CheckVersion.cpp
  CheckVersion.h
  CloseApplicationDlg.cpp
  CloseApplicationDlg.h
  ConfirmationDlg.cpp
  ConfirmationDlg.h
  ConnectionTest.cpp
  ConnectionTest.h
  Constants.h
  CopyFile.cpp
  CopyFile.h
  CopyFolder.cpp
  CopyFolder.h
  CustomBitmapButton.cpp
  CustomBitmapButton.h
  Download.cpp
  Download.h
  EditLicense.cpp
  EditLicense.h
  ErrorDlg.cpp
  ErrorDlg.h
  EventActions.h
  EventData.cpp
  EventData.h
  EventInfo.cpp
  EventInfo.h
  exe
  ...\upx.exe
  FileData.cpp
  FileData.h
  FileVersion.cpp
  FileVersion.h
  FtpFileObject.cpp
  FtpFileObject.h
  Functions.cpp
  Functions.h
  GarbageCollector.cpp
  GarbageCollector.h
  GetOpt.cpp
  GetOpt.h
  HttpFileObject.cpp
  HttpFileObject.h
  HyperlinkLabel.cpp
  HyperlinkLabel.h
  InformationDlg.cpp
  InformationDlg.h
  IniData.cpp
  IniData.h
  Install.cpp
  Install.h
  InstallFiles.cpp
  InstallFiles.h
  InstallIni.cpp
  InstallIni.h
  InstallRegistry.cpp
  InstallRegistry.h
  InternalData.cpp
  InternalData.h
  Internet.cpp
  Internet.h
  Language.cpp
  Language.h
  Log.cpp
  Log.h
  LogViewerDlg.cpp
  LogViewerDlg.h
  Markup.cpp
  Markup.h
  md5.cpp
  md5.h
  ModeFullPropCheck.cpp
  ModeFullPropCheck.h
  ModeFullPropDownload.cpp
  ModeFullPropDownload.h
  ModeFullPropFinish.cpp
  ModeFullPropFinish.h
  ModeFullPropHtmlMessage.cpp
  ModeFullPropHtmlMessage.h
  ModeFullPropInstall.cpp
  ModeFullPropInstall.h
  ModeFullPropLicense.cpp
  ModeFullPropLicense.h
  ModeFullPropProtection.cpp
  ModeFullPropProtection.h
  ModeFullPropRollback.cpp
  ModeFullPropRollback.h
  ModeFullPropSelectUpdate.cpp
  ModeFullPropSelectUpdate.h
  ModeFullPropWelcome.cpp

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 To Search: updater update updater_src0.8.1.6 

 [update2.0.rar] - Remote online upgrade process, you can use this procedure for you to provide remote software upgrade capability
 [HTTP.rar] - HTTP protocol to download through the procedures, support HTTP download and multithreading. Note that this procedure can only be downloaded once a tas
 [Register.rar] - This procedure for the registration of software modules, available CPU, disk and network card serial number address, generate registration key, used t

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 [updateApp.rar] - now sharing software has many "online upgrade" features such as "Windows optimization guru" and "Super Rabbit", the so-c
 [Download111.rar] - used by HTTP protocol to download procedures, and HTTP support multithreading Download
 [URLDownLoadtoFile.rar] - Use URL files to download. And save to your hard disk.
 [leo2005.rar] - multithreading downloadable program that will automatically update the file. We can look at the code. Can valuable.
 [Autoupdate-1.0.0509.src.zip] - A simple automatic upgrade feature of the code. Overflow for very beginners.