I was fairly sure that if you set ARPSIZE it sets the EstimatedSize property that Raymond talks about at http://blogs.msdn.com/oldnewthing/archive/2004/07/09/178342.aspx, and therefore ARP doesn't need to guess at the right thing to look at to check the size.
Since Windows Installer knows everything that you installed, you would have thought it would set this information itself. (Another piece of the documentation, indexed under 'Uninstall Registry Key', states that it does, which leads to the question, what is ARPSIZE for?) When you set ARPSYSTEMCOMPONENT you're telling Windows Installer, 'this is a system component, don't show it in Add/Remove Programs'. So it doesn't, and it doesn't write any of the other information to HKLM\Software\Microsoft\Windows\Uninstall that it normally would. (What would be the point? You can't see it anyway.) Using ARPSYSTEMCOMPONENT to support your own bootstrap, to prevent Windows Installer writing its own UninstallString, is kind of a convenient accident. I'm not sure it was originally intended. The documentation actually says "Setting the ARPSYSTEMCOMPONENT property to 1 using the command line or a transform prevents the application from being displayed in the Add or Remove Programs list of Control Panel." No mention of doing it in the original package! I think the idea was that OEMs would set it for anything they didn't want their users to uninstall. -- Mike Dimmick -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rob Mensching Sent: 22 February 2008 07:13 To: Ahn Ahn Liu Cc: wix-users@lists.sourceforge.net Subject: Re: [WiX-users] Setting Estimated Size and Version 1. ARPSIZE is set magically by ARP. There is no real way to control it. Raymond Chen (Master of all things Shell) had a fun blog entry about how ARP calculated the size it displayed there. The fact that it took him a couple paragraphs is telling. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users
