If you knew the UpgradeCode of an existing product, you could find it using the FindRelatedProducts action. Use the <Upgrade> element and specify OnlyDetect="yes" on the <UpgradeVersion> element if you only want to know if the product is installed rather than actually removing it. A ProductCode refers only to one specific version and language of a product, while the same UpgradeCode is normally used for all versions and languages of the same product.
As far as the MSM goes, if your product depends on the contents of that MSM, you should merge it into your package. This ensures that the reference counts on the components of that MSM are incremented, ensuring that the components are not prematurely removed when all other products which installed those components are uninstalled. If you're trying to limit the size of the package downloaded by the user, you might be able to keep the files to be installed in separate CABs, and have Windows Installer download them on-demand, but someone else will have to help you there! (I know Windows Installer has the capability since I've seen the Platform SDK Web Install do it, but I don't know how to do it). -- Mike Dimmick -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter G. Sakhno Sent: 09 October 2006 14:02 To: wix-users@lists.sourceforge.net Subject: [WiX-users] How to find is product/merge module installed? How to find if a product is already installed if it's Product Id is known? Should be implemented some DLL/EXE-based CA or there are any "standard" MSI commands available? The same about merge module. I want to find out if any copy of particular MSM (defined by its GUID) is installed, regardless of a product that encloses the MSM. Best regards, Peter G. Sakhno C-MAP RUSSIA Ltd http://www.c-map.ru/ ------------------------------------------------------------------------ - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDE V _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users
