title: How to set MSI custom property
body: <p>Ultimately I'm wanting to determine the version of an MSI without installing. There are answers <a href="https://stackoverflow.com/questions/10233400/how-to-get-msi-version">like this</a> but in my case I am actually generating the MSI (using WIX) and figured I should be able to set a custom property, viewable via right-mouse->properties->custom on the msi file, that represents the version number. <img src="https://i.stack.imgur.com/9iPaU.png" alt="enter image description here">  It would have no purpose other than to enable someone to query an msi file to see the version before installing (the .msi file will have the version number imbeded in it's filename but a custom property seems a better idea).  Thanks</p>
  
  <p>I should add I have tried "<code>&lt;Property Id='Version' Value="27.3" /&gt;</code>" in WIX wxs file under <code>&lt;Wix&gt;&lt;Product&gt;</code> to no avail. It does not appear anywhere viewable via properties on the generated msi file from Explorer</p>
  
  <p>Details from File explorer->right-mouse->properties
  <img src="https://i.stack.imgur.com/UPMag.png" alt="enter image description here"></p>