Wix heat for per machine installer

问题

I use the following command to create a wxs file for class registry, using heat:

"C:\Program Files\Windows Installer XML v3.5\bin\heat.exe"   
    file MyAddin.dll -ag -template fragment -out MyAddin.wxs  

The result is registry entries per user. In the following lines from the created wxs file you can see HKCU -- for HKEY_CURRENT_USER:

<Class Id="{1AF5E2B9-CC02-368F-A879-1DF3F538D71A}" Context="InprocServer32"
       Description="AdminAddins.MyClass" ThreadingModel="both"
       ForeignServer="mscoree.dll">
     <ProgId Id="AdminAddins.MyClass" Description="AdminAddins.MyClass" />
</Class>  

<File Id="fil08256E64C10A4B2F5423A768ECB9A473" Name="AdminAddins.dll"
      KeyPath="yes" Source="..\AdminAddins\bin\Release\AdminAddins.dll" />
<RegistryValue Root="HKCU" Key="\CLSID\{1AF5E2B9-CC02-368F-A879-1DF3F538D71A}\Implemented Categories\{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}"
               Value="" Type="string" Action="write" />  

How should I change the command so that the file contains values for a "per machine" installer?

来源：https://stackoverflow.com/questions/24595470/wix-heat-for-per-machine-installer