Hello

How can i control, that a user can't start my VB.Net-Program 2 ore more times at once (maybee like Outlook)?

At same time Parameters which are transfered with the second program should be transfered to the first program.

Best regards
Josh

If you are using VB2005, it's built in. Open the project's properties panel
(Project --> WindowsApplication1 Properties), select the Application tab,
make sure that "Enable application framework" is selected, and then select
"Make single instance application." To process the incoming arguments for
subsequent startups, click the "View Application Events" button on that same
panel. In the code file that appears, add an event handler for MyApplication_StartupNextInstance.
In that handler, the e.CommandLine property gives you access to the new command
line.

-----
Tim Patrick - www.timaki.com
Start-to-Finish Visual Basic 2005

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Thanks & Best Regards

Josh

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This is what I use for VB.NET 2003:

#Region "Previous Existance Function"
    ' Previous Existance function
    Private Function PrevInstance() As Boolean
        ' Check to see if another existance of the assembly is found
        If UBound(System.Diagnostics.Process.GetProcessesByName(System.Diagnostics.Process.GetCurrentProcess.ProcessName)) > 0 Then
            ' Yes, it was - return true
            Return True
            ' No previous existance found - return false
        Else
            Return False
        End If
    End Function

#End Region

Usage:

        ' Check for previous existance of the application
        If PrevInstance() = True Then
            ' Display a message box if a previous existance exists
            MessageBox.Show("The application is already running. Press OK to exit", Me.Text, MessageBoxButtons.OK, MessageBoxIcon.Error)
            ' End the application (see note at bottom of header above)
            End
        End If

I hope this helps,

Newbie Coder
  How can i control, that a user can't start my VB.Net-Program 2 ore more times at once (maybee like Outlook)?

  At same time Parameters which are transfered with the second program should be transfered to the first program.

  Best regards
  Josh

Josh,

Rereading the excelent answer from Tim, if it is for versions before 2005 than is this in my idea the best result from endless discussion about this question on this board.

http://www.vb-tips.com/dbpages.aspx?ID=59135549-e5dd-4501-9526-343ac05a7617

Keep in mind that our website is under construction at the moment

Cor

  How can i control, that a user can't start my VB.Net-Program 2 ore more times at once (maybee like Outlook)?

  At same time Parameters which are transfered with the second program should be transfered to the first program.

  Best regards
  Josh

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