Hi all i hope this little code help some people.
This code is to make your program can't open 2 times so when you open your app and try to open it again a msgbox will pop up and wont let you open it again.
Dim CurrentProcesses() As Process
Protected Overrides Sub OnHandleCreated(ByVal e As System.EventArgs)
CurrentProcesses = Process.GetProcessesByName _
(Process.GetCurrentProcess.ProcessName)
If CurrentProcesses.GetUpperBound(0) <= 0 Then
Exit Sub
End If
Dim XMsg As String = "Here is what ever you want the msgbox say."
MessageBox.Show(XMsg, _
"Here is the Title of the MsgBox", _
MessageBoxButtons.OK, _
MessageBoxIcon.Error)
End
End Sub
i hope i help you