Not more than one instance per user, But allow on different users

[André Nogueira]

Hi there guys
I want my program not to allow more than one instance per user.
Now I have this code
CODE
Dim Processos() As Process
Processos = Process.GetProc essesByName("Ta skfind")
If Processos.Lengt h > 1 Then
NotifyIcon1.Vis ible = False
End
End If
The problem is that if Fast User Switching is enabled on XP and one user is
running my program, all the other users of that machine can't run the
program.
What can I do to ensure that no other instance of my program is running, but
only on the current user?
Thank you in advance!

Andre Nogueira

[Mike McIntyre [MVP]]

On approach is to use a Mutex.

See: http://codeproject.com/vb/net/sing_inistan.asp

You must establish a Mutex for each user.
--
Mike

Mike McIntyre
Visual Basic MVP
www.getdotnetcode.com

"André Nogueira" <an**@netcabo.p t.NOSPAM> wrote in message
news:O8******** ******@TK2MSFTN GP12.phx.gbl...

Hi there guys
I want my program not to allow more than one instance per user.
Now I have this code
CODE
Dim Processos() As Process
Processos = Process.GetProc essesByName("Ta skfind")
If Processos.Lengt h > 1 Then
NotifyIcon1.Vis ible = False
End
End If
The problem is that if Fast User Switching is enabled on XP and one user
is running my program, all the other users of that machine can't run the
program.
What can I do to ensure that no other instance of my program is running,
but only on the current user?
Thank you in advance!

Andre Nogueira

[Crouchie1998]

Use this function:

Private Function PrevInstance() As Boolean
If
UBound(System.D iagnostics.Proc ess.GetProcesse sByName(System. Diagnostics.Pro cess.GetCurrent Process.Process Name)) > 0 Then
Return True
Else
Return False
End If
End Function

In form load:

If PreviousExistan ce() = True Then
MessageBox.Show ("Applicatio n is already running. Press OK to exit")
End
End If

If you use 'Application.Ex it()' after showing the message box then the form
is briefly shown, but with 'End' it is halted immediately & the form is never
shown.

I hope this helps

"Mike McIntyre [MVP]" wrote:

On approach is to use a Mutex.

See: http://codeproject.com/vb/net/sing_inistan.asp

You must establish a Mutex for each user.
--
Mike

Mike McIntyre
Visual Basic MVP
www.getdotnetcode.com

"André Nogueira" <an**@netcabo.p t.NOSPAM> wrote in message
news:O8******** ******@TK2MSFTN GP12.phx.gbl...

Hi there guys
I want my program not to allow more than one instance per user.
Now I have this code
CODE
Dim Processos() As Process
Processos = Process.GetProc essesByName("Ta skfind")
If Processos.Lengt h > 1 Then
NotifyIcon1.Vis ible = False
End
End If
The problem is that if Fast User Switching is enabled on XP and one user
is running my program, all the other users of that machine can't run the
program.
What can I do to ensure that no other instance of my program is running,
but only on the current user?
Thank you in advance!

Andre Nogueira