duplicate instance

[cccruz18]

Hi!

Help please! My VB application is running through Microsoft Scheduler. My problem is that there are times that the application is manually opened thus having duplicate instance - one in scheduler and one manually opened. How can I prevent this? I've tried using preinstance but it seems that this is only used if the application is opened manually twice.



Ann

 

[CassandraR]

Hi Ann:

Suspect that you may be able to use:

    If App.PrevInstance Then Unload Me

in your start-up code.

Cassie

 

[cccruz18]

Hi!
Yes. Already tried PrevInstance. It seems that the command does not work in Microsoft Scheduler. Is there any other way to trap duplicate instance?
Thanks.
Ann

 

[TheTuna]

Actually, you need to use previousinstance within the vb application itself...

In your VB app's main or frmMain or whatever form is first to be displayed or loaded, put the call in the form_load event.

It shouldn't matter how or when the vb application is started, be it manually or by any scheduling app.

Cassie was correct... Tuna - It's fat free until you add the Mayo!

 

[cccruz18]

Hi!

Rephrasing my question: What I mean is I have already inserted PrevInstance in my VB Application.

Private Sub Form_Load()
If App.PrevInstance Then Unload Me
End Sub

When compiled, add .exe to the scheduled task that runs everyday and closes after completing a process.

However, there are cases while the application is running in scheduled task, users intend to open using programs then application or double click application. This causes duplicate instances. How can I prevent this? Please help.

Thanks.
Ann