Visual basic run correctly in administrator mode but not in normal mode

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Hi,

In VB6.0, InStr() function and DateAdd() functions are working correctly in Run as Administrator mode. The same is showing error in Normal mode. What is the problem? How to execute those functions in normal mode also. Please help me.....

What I have tried:

I uninstall and Install Visual studio 6.0 software then only it is running successfully in Administrator mode.

Posted 28-Sep-20 23:52pm

Member 10556393

Updated 29-Sep-20 0:19am

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Richard Deeming 29-Sep-20 6:31am

NB: VB6 has been dead for almost 20 years now. Unless you're maintaining an existing ancient application, you should look at using a more modern language for your development instead.

CHill60 29-Sep-20 11:15am

What is the error that is shown? And share the code that is producing it

Member 10556393 30-Sep-20 8:08am

The error is Invalid procedure call or argument in DateAdd("m",-1,"2020/09/29") function.

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OriginalGriff · Answer 1 · 2020-09-29T00:19:00

It's very unlikely that either InStr or DateAdd would require admin privileges: they are just function called in the VB6 framework and don't access anything outside the app.

So, the possibilities:
1) Your system or your app is infected with something nasty which tries to access privileged data.
2) The code that uses InStr and DateAdd also tries to do something that requires elevation: read or write a file in an "unusual location" for example.
3) The code that uses InStr and DateAdd is located in a privileged folder and can't be executed without elevation as a result.

Start with the first: not because it's the most likely, but because it's the easiest to spot and the biggest risk.

Then check the others: bear in mind that in release, apps are installed in read only folders below Program Files for security, so code which uses data in the exe folder will work in development but may fail in production.

If you really can't work it out, create a bare minimum application (console app, couple of lines of code maximum) that still shows the problem, and show that complete code so we can try to replicate it here.