Click here to Skip to main content
Click here to Skip to main content
Go to top

Two Simple Lines for Self-Repairing Apps

, 16 Feb 2000
Rate this:
Please Sign up or sign in to vote.
Creating Self-Repairing Applications using Windows Installer

Introduction

Ever wondered how MS Office 2000 repairs itself if any files are corrupted or missing? Just two lines of code can add this feature to your app.

First off, you must create an installer program from Windows Installer (free for Visual Studio 6.0 or VC++ 6.0 customers). The self-repairing services are provided via the Windows Installer system. If you are not developing for Windows 2000 only, make sure to set the project settings so that the Setup.exe file will install Windows Installer on the system if it is not already present (Windows Installer comes with Windows 2000, but is not included with previous versions of Windows).

Once your program is installed, it can verify and reinstall needed components with the following two lines.

MsiSetInternalUI(INSTALLUILEVEL_NONE,NULL);
MsiReinstallProduct("{A5A0D1C0-DF1A-11D3-99DC-00A0CCFFFAA1}",
       REINSTALLMODE_FILEVERIFY | REINSTALLMODE_FILEMISSING 
       | REINSTALLMODE_FILEOLDERVERSION | REINSTALLMODE_REPAIR);

To compile, you will need to link your product with the installer library (msi.lib) and include the installer header msi.h.

Make sure to replace the product ID with the product ID that is in the settings dialog for your program. This is needed by Windows Installer. Additionally, the first line is not required. However, it will hide the GUI from the user (without it, a Windows installer dialog will appear). Other settings are:

// Authored user interface with wizards, progress, and errors.
NSTALLUILEVEL_FULL
// Authored user interface with wizard dialog boxes suppressed.
INSTALLUILEVEL_REDUCED
// Simple progress and error handling.
INSTALLUILEVEL_BASIC
// The installer chooses an appropriate user interface level.
INSTALLUILEVEL_DEFAULT
// The installation level is not changed.
INSTALLUILEVEL_NOCHANGE
// Completely silent installation.
INSTALLUILEVEL_NONE

For the reinstall function, possible options are:

// Repair any defects encountered.
REINSTALLMODE_REPAIR
// Reinstall only if the file is missing.
REINSTALLMODE_FILEMISSING
// Reinstall if the file is missing or is an older version.
REINSTALLMODE_FILEOLDERVERSION
// Reinstall if the file is missing or is an equal or older version.
REINSTALLMODE_FILEEQUALVERSION
// Reinstall if the file is missing or is not an exact version.
REINSTALLMODE_FILEEXACT
// Check sum executables, and reinstall if they are missing or corrupt.
REINSTALLMODE_FILEVERIFY
// Reinstall all the files regardless of version.
REINSTALLMODE_FILEREPLACE
// Ensure required user regular entries.
REINSTALLMODE_USERDATA
// Ensure required machine regular entries.
REINSTALLMODE_MACHINEDATA
// Validate shortcuts and progman items.
REINSTALLMODE_SHORTCUT

That's it!

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

Share

About the Author

Jesse Ezell

United States United States
No Biography provided

Comments and Discussions

 
GeneralTamper Aware and Self Healing Code PinmemberJeffrey Walton28-May-07 20:25 
QuestionHow to disable the self-repair? Pinmemberjoanne_fredrickson28-Oct-03 15:16 
AnswerRe: How to disable the self-repair? PinmemberYogurt9-Mar-04 6:22 
GeneralRe: How to disable the self-repair? Pinmembermatzy11-Nov-04 8:30 
GeneralRe: How to disable the self-repair? PinmemberGuerven10-Jun-07 23:16 
GeneralUseful PinmemberArmen Hakobyan8-Jun-02 3:17 
GeneralUnclear PinmemberHongwei Jia26-Feb-01 10:20 
GeneralRe: Unclear Pinmemberlauren26-Feb-01 10:46 
looking at the code lines and the comment "link with ...." it appears to me to be in your app that you put the code ... i would assume putting them in the InitInstance() function of the CMainFrame() class would be the correct way but shoot me if i'm wrong
Smile | :)
 
"every year we invent better idiot proof systems and every year they invent better idiots"
GeneralRe: Unclear PinmemberHongwei27-Feb-01 4:12 
Generalunclear about implementation.... PinmemberJeff Douglas2-Feb-01 4:33 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web04 | 2.8.140921.1 | Last Updated 17 Feb 2000
Article Copyright 2000 by Jesse Ezell
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid