title: How do i pass parameters between wxs files in WIX?
body: <p>I have constructed a bootstrapper bundle with WIX 3.8, in which i pass a given parameter (by DOS-window) for the installation directory to the MSI file.
  All works fine.</p>
  
  <p>But now we want to put a second WXS file between the bootstrapper and the MSI.
  This one is called Source.wxs and contains the variable for the installation directory and the MsiPackage-tag (which was in the bootstrapper file before), which will start the MSI.
  The big question is: How can i pass my parameter from the bootstrapper to the second WXS file?</p>
  
  <p>Thanks in advance!
  Patrick</p>