Make Single Instance Application VS 2005

[heminfotech]

Hi

I have search for the above said issue and it gives me the same solution that it has option in application properties application tab. But Somehow I am not able to see the same can any one help me please

Find attached image

[joedeene]

try the settings tab under property?

joedeene

[Curtis Rutland]

try this link out. Not the method you are looking for, but a different means to the same end.

[tlhintoq]

Plan B: Use a little code from VB.
Be sure to add a reference to Microsoft Visual Basic then add this code to your Program.CS file

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main(string[] commandLine)
        {
            Control.CheckForIllegalCrossThreadCalls = false;
            if (bSplash) SplashScreen.ShowSplashScreen();
            if (bSplash) SplashScreen.SetStatus("Getting Environmental information");

            Application.EnableVisualStyles();
            App myApp = new App();
            myApp.Run(commandLine);
        }
    }



    /// <summary>
    ///  We inherit from WindowsFormApplicationBase which contains the logic for the application model, including
    ///  the single-instance functionality.
    /// </summary>
    class App : Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase
    {
        public App()
        {
            this.IsSingleInstance = true; // makes this a single-instance app
            this.EnableVisualStyles = true; // C# windowsForms apps typically turn this on.  We'll do the same thing here.
            this.ShutdownStyle = Microsoft.VisualBasic.ApplicationServices.ShutdownMode.AfterMainFormCloses; // the vb app model supports two different shutdown styles.  We'll use this one for the sample.
        }

        /// <summary>
        /// This is how the application model learns what the main form is
        /// </summary>
        protected override void OnCreateMainForm()
        {
            this.MainForm = new Form1();
        }


        /// <summary>
        /// Gets called when subsequent application launches occur.  The subsequent app launch will result in this function getting called
        /// and then the subsequent instances will just exit.  You might use this method to open the requested doc, or whatever 
        /// </summary>
        /// <param name="eventArgs"></param>
        protected override void OnStartupNextInstance(Microsoft.VisualBasic.ApplicationServices.StartupNextInstanceEventArgs eventArgs)
        {
            base.OnStartupNextInstance(eventArgs);
            //System.Windows.Forms.MessageBox.Show("An attempt to launch another instance of this app was made");
        }

    }

You probably want to delete or comment out lines 8 and 9 since they are for a splash screen that won't exist in your project.