C#

e.BringToForeground = false;

using System;
using System.Windows.Forms;
using System.Linq;
using Microsoft.VisualBasic.ApplicationServices;

namespace FileArranger
{
	/// <summary>
	/// Class with program entry point.
	/// </summary>
	
	internal sealed class Program
	{
		/// <summary>
		/// Program entry point.
		/// </summary>
		/// 

		[STAThread]
		static void Main()
		{
			Application.EnableVisualStyles();
			Application.SetCompatibleTextRenderingDefault(false);
			
			string[] args = Environment.GetCommandLineArgs();
			var controller = new SingleInstanceController();
			controller.Run(args);
		}
	}
	
	public class SingleInstanceController : WindowsFormsApplicationBase
	{
		public SingleInstanceController()
		{
			IsSingleInstance = true;
			StartupNextInstance += StartedAgainInstance;
		}
		
		void StartedAgainInstance(object sender, StartupNextInstanceEventArgs e)
		{
			var form = MainForm as MainForm;
			e.BringToForeground = false;
			form.ReadArguments(e.CommandLine.ToArray());
		}
		
		protected override void OnCreateMainForm()
		{
			MainForm = new MainForm();
		}
	}
}

protected override bool ShowWithoutActivation
{
    get { return true; }
}

using System;
using System.Windows.Forms;
using SA.Universal.SingleInstance;

namespace FileArranger
{
	internal sealed class Program
	{
		[STAThread]
		static void Main(string[] commandLine)
		{
            if (SingleInstanceManager.IsSecondInstance)
            {
                SingleInstanceManager.HandleRemoteCommandLine(commandLine);
                SingleInstanceManager.ActivateFirstInstance();
                return;
            }

            Application.EnableVisualStyles();
			Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new MainForm());
		}
	}
}

using SA.Universal.SingleInstance;

SingleInstanceManager.FilesLoading += (sender, eventArgs) => {
    Invoke(new System.Action(() => ReadArguments(eventArgs.CommandLine)));
};

if (SingleInstanceManager.IsSecondInstance)
{
    SingleInstanceManager.HandleRemoteCommandLine(commandLine);
    SingleInstanceManager.ActivateFirstInstance();
    return;
}

alin1 wrote:

I suspect the issue is here:

if (SingleInstanceManager.IsSecondInstance)
{
    SingleInstanceManager.HandleRemoteCommandLine(commandLine);
    SingleInstanceManager.ActivateFirstInstance();
    return;
}

The second instance should pass the command line arguments to the first instance. But how to do that?

Member 12536513 wrote:

Any ideas how to make it work?

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

Quote:

The problem is that I need to pass 2 rounds of parameters