MSIX -> Local Activation permission for COM

Hi TIMOTHY_MANGAN 

I followed through what you advised but to no avail. 

1. I altered the AppxManifest.xml (format and namespace its a bit different, it has been serialized by a CI tool) as 

<?xml version="1.0" encoding="utf-8"?>
<Package xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10">
  <Identity Name="WeatherHistory" Version="0.7.0.2" Publisher="CN=Contoso Software, O=Contoso Corporation, C=US" />
  <Properties>
    <DisplayName>Weather History</DisplayName>
    <PublisherDisplayName>Cosmic ray</PublisherDisplayName>
    <Logo>Images/satelite.png</Logo>
  </Properties>
  <Dependencies>
    <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.17763.0" MaxVersionTested="10.0.18363.0" />
    <TargetDeviceFamily Name="Windows.Desktop" MinVersion="10.0.17763.0" MaxVersionTested="10.0.18363.0" />
  </Dependencies>
  <Resources>
    <Resource Language="en-us" />
  </Resources>
  <Applications>
    <Application Id="Weather.History" Executable="Weather.History.Splash.exe" EntryPoint="Weather.History.Splash">
      <VisualElements DisplayName="Weather History" Description="Frontend" Square150x150Logo="Images/satelite.png" Square44x44Logo="Images/satelite.png" BackgroundColor="yellow" xmlns="http://schemas.microsoft.com/appx/manifest/uap/windows10" />
      <Extensions>
        <Extension Category="windows.fullTrustProcess" Executable="Weather.History.Stylet.exe" xmlns="http://schemas.microsoft.com/appx/manifest/desktop/windows10" />
      </Extensions>
    </Application>
  </Applications>
  <Capabilities>
    <Capability Name="runFullTrust" xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities" />
    <Capability Name="internetClient" />
  </Capabilities>
</Package>

2. Added code to the bootstrapper ap as *Splash.exe as 

        private async void LaunchProduct()
        {
            try
            {
                if (ApiInformation.IsApiContractPresent("Windows.ApplicationModel.FullTrustAppContract", 1, 0))
                {
                    await FullTrustProcessLauncher.LaunchFullTrustProcessForCurrentAppAsync();
                }
                else
                {
                    Exit($"Your Windows version is not supported.");
                }
            }
            catch (Exception e)
            {
                Exit("Failed to launch Weather History", e);
            }
        }

I witness the same errors in the Event Viewer as earler. For some reason the Splash.exe is not even starting, hence it has no chance to launch the proc I specified as fullTrustProcess.

None of these are UWP. WPF. I referenced further assemblies as:

• C:\Program Files (x86)\Windows Kits\10\UnionMetadata\10.0.18362.0\Windows.winmd
• C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETCore\v4.5\System.Runtime.WindowsRuntime.dll 

 The package itself has already the capabilities you advised to include: