New Post: Upgrading program

• I just tested the GetProductCode and in my environment it works for both CPU types just fine:

class Program
{
    staticpublicvoid Main(string[] args)
    {
        var installed = AppSearch.IsProductInstalled("{1D6432B4-E24D-405E-A4AB-D7E6D088CBC9}");
        Console.WriteLine(installed);
    }
}

• project.GUID is not a product code. But Project.ProductId is. You can assign it explicitly. If you don't then Wix# will auto allocate it for you. It will be derived from project.GUID. After the build Wix# always prints out the all allocated ids:

 ProductName: MyProduct
 Version    : 1.0.0.0
 ProductId  : {6f330b47-2577-43ad-9095-1861ca25889c}
 UpgradeCode: {6f330b47-2577-43ad-9095-1861ba25889b}

project.BuildMsi();
Console.WriteLine(project.ProductId);