OnTopReplica/src/PostInstaller/Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace PostInstaller {
    class Program {
        static int Main(string[] args) {
#if DEBUG
            foreach(var a in args) {
                Console.Write(a);
                Console.Write(" ");
            }
            Console.WriteLine();
#endif

            var success = Run(args);

#if DEBUG
            Console.Read();
#endif

            return success ? 0 : 1;
        }

        private static bool Run(string[] args) {
#if DEBUG
            Console.WriteLine("Attempting to create IShellItem for file {0}...", args[0]);
#endif
            IShellLink link = (IShellLink)new CShellLink();

            //Win32Shell.SHCreateItemFromParsingName(args[0], IntPtr.Zero, Win32Shell.IShellLinkId, out link);
            IPersistFile persistFileLink = (IPersistFile)link;
            if (persistFileLink.Load(args[0], 0x00000002L) != 0) {
                Console.WriteLine("Failed to load via IPersistFile.");
                return false;
            }

            link.Resolve(IntPtr.Zero, 0);

#if DEBUG
            Console.WriteLine("Querying for IPropertyStore interface...");
#endif
            IPropertyStore propStore = (IPropertyStore)link;

            try {
#if DEBUG
                Console.WriteLine("Attempting to set property 'System.AppUserModel.ID' to {0}...", args[1]);
#endif

                PropertyKey appUserModelKey = new PropertyKey(new Guid("9F4C2855-9F79-4B39-A8D0-E1D42DE1D5F3"), 5);
                propStore.SetValue(ref appUserModelKey, new BStrWrapper(args[1]));
                propStore.Commit();

                //Store
                ((IPersistFile)link).Save(args[0], false);
            }
            catch (Exception ex) {
                Console.WriteLine("Unable to set value of AppUserModel.ID property.");
                Console.WriteLine(ex);
                
                return false;
            }
            
            return true;
        }
    }
}