Improve company productivity with a Business Account.Sign Up

x
?
Solved

VB5: Test for Previous Installations

Posted on 1998-05-28
1
Medium Priority
?
140 Views
Last Modified: 2010-05-18
I have modified the standard setup.exe project in VB to give me what I need.  One last function I would like to add is the ability of setup to check and see if my application is currently installed on the user's computer.  If so, I want to either alert the user that they need to perform an un-install or just launch the un-install from setup.exe.

Control Panel Add/Remove keeps a list of installed applications.  Where is this list?  How can I parse it?  Is there simply an API call that I can ustilize to check for a current installation?

Microsoft's programs all check for previous installations and even go so far as to note which components were installed.  How do they do this?  It appears as if their programs actually search the hard disk for files related to the application.  Why would they do this if the information is accessible via the control panel?

Aaaaah!!!

Has anyone run accross this?  Any ideas?

Lankford
0
Comment
Question by:lankford
1 Comment
 
LVL 1

Accepted Solution

by:
tstrob earned 300 total points
ID: 1461962
I am using to store information of installation to registry. (Im doing this with a modified setup-application)

When setup launches, I first check if my software installed.

You can launch the deinstallationprogram in this case (safe also the path to your installation to registry)

To make this more effective, you can store a value to registry when starting setup which will be removed after setup. So you can check for aborted installations.

Use this Registrykey for example
HKEY_LOCAL_MACHINE\SOFTWARE\Your_Name\Your_Applicationname\Setupinformation


0

Featured Post

Keep up with what's happening at Experts Exchange!

Sign up to receive Decoded, a new monthly digest with product updates, feature release info, continuing education opportunities, and more.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

I’ve seen a number of people looking for examples of how to access web services from VB6.  I’ve been using a test harness I built in VB6 (using many resources I found online) that I use for small projects to work out how to communicate with web serv…
This article describes some techniques which will make your VBA or Visual Basic Classic code easier to understand and maintain, whether by you, your replacement, or another Experts-Exchange expert.
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…
This lesson covers basic error handling code in Microsoft Excel using VBA. This is the first lesson in a 3-part series that uses code to loop through an Excel spreadsheet in VBA and then fix errors, taking advantage of error handling code. This l…

606 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question