UWPHook/UWPHook/ProcessManager.cs

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

namespace UWPHook
{
    class AppManager
    {
        private int id;

        public void LaunchUWPApp(string uri)
        {
            var mgr = new ApplicationActivationManager();
            uint processId;
            mgr.ActivateApplication(uri, null, ActivateOptions.None, out processId);

            id = (int)processId;
        }

        public Boolean IsRunning()
        {
            if (id == 0)
            {
                return false;
            }

            try
            {
                Process.GetProcessById(id);
            }
            catch (Exception)
            {
                return false;
            }

            return true;
        }
    }

    public enum ActivateOptions
    {
        None = 0x00000000,  // No flags set
        DesignMode = 0x00000001,  // The application is being activated for design mode, and thus will not be able to
                                  // to create an immersive window. Window creation must be done by design tools which
                                  // load the necessary components by communicating with a designer-specified service on
                                  // the site chain established on the activation manager.  The splash screen normally
                                  // shown when an application is activated will also not appear.  Most activations
                                  // will not use this flag.
        NoErrorUI = 0x00000002,  // Do not show an error dialog if the app fails to activate.
        NoSplashScreen = 0x00000004,  // Do not show the splash screen when activating the app.
    }

    [ComImport, Guid("2e941141-7f97-4756-ba1d-9decde894a3d"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    interface IApplicationActivationManager
    {
        // Activates the specified immersive application for the "Launch" contract, passing the provided arguments
        // string into the application.  Callers can obtain the process Id of the application instance fulfilling this contract.
        IntPtr ActivateApplication([In] String appUserModelId, [In] String arguments, [In] ActivateOptions options, [Out] out UInt32 processId);
        IntPtr ActivateForFile([In] String appUserModelId, [In] [MarshalAs(UnmanagedType.Interface, IidParameterIndex = 2)] /*IShellItemArray* */ IShellItemArray itemArray, [In] String verb, [Out] out UInt32 processId);
        IntPtr ActivateForProtocol([In] String appUserModelId, [In] IntPtr /* IShellItemArray* */itemArray, [Out] out UInt32 processId);
    }

    [ComImport, Guid("45BA127D-10A8-46EA-8AB7-56EA9078943C")]//Application Activation Manager
    class ApplicationActivationManager : IApplicationActivationManager
    {
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)/*, PreserveSig*/]
        public extern IntPtr ActivateApplication([In] String appUserModelId, [In] String arguments, [In] ActivateOptions options, [Out] out UInt32 processId);
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        public extern IntPtr ActivateForFile([In] String appUserModelId, [In] [MarshalAs(UnmanagedType.Interface, IidParameterIndex = 2)]  /*IShellItemArray* */ IShellItemArray itemArray, [In] String verb, [Out] out UInt32 processId);
        [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType = MethodCodeType.Runtime)]
        public extern IntPtr ActivateForProtocol([In] String appUserModelId, [In] IntPtr /* IShellItemArray* */itemArray, [Out] out UInt32 processId);
    }

    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("43826d1e-e718-42ee-bc55-a1e261c37bfe")]
    interface IShellItem
    {
    }

    [ComImport]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [Guid("b63ea76d-1f85-456f-a19c-48159efa858b")]
    interface IShellItemArray
    {
    }
}