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Visual Studio226
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.GetProcessesByName("Taskfind")

If Processos.Length>1 Then

NotifyIcon1.Visible = 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


-

On approach is to use a Mutex.



See: codeproject.com/vb/net/sing_inistan.asp">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" <anog@netcabo.pt.NOSPAM>wrote in message



-

Use this function:



Private Function PrevInstance() As Boolean

If

UBound(System.Diagnostics.Process.GetProcessesByName(System.Diagnostics.Process.GetCurrentProcess.ProcessName))>0 Then

Return True

Else

Return False

End If

End Function



In form load:



If PreviousExistance() = True Then

MessageBox.Show("Application is already running. Press OK to exit")

End

End If



If you use 'Application.Exit()' 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: