You must always use the handle supplied to you from the entry point (custom action function) into your DLL. Do not ever save it for a different entry point, because it may not be valid in other calls or any time after code returned back out the entry point it was supplied to you on. If you have multi-threaded custom actions, they can't use that session handle after the original thread returns out the original entry point.
The custom action library code in WiX saves the session handle, but that only works with correct and rigorous use of the entry and exit functions/macros in that library to respect the above rule. -----Original Message----- From: gapearce [mailto:mr_gapea...@yahoo.com] Sent: Wednesday, June 16, 2010 11:20 AM To: wix-users@lists.sourceforge.net Subject: Re: [WiX-users] Unable to log through DLL using MsiProcessMessage I have a similar problem, and I see this message was ignored by the community. Maybe it is a stupid question? I dunno - but I have the problem too. I noticed my MSIHANDLE is one ('1') before installation of the files. AFter the files are installed, the MSIHANDLE is eight ('8'). Before installing the files, I can log custom messages to the log file from my DLL, no problem. But after the files are installed, (just before exit dialog), I can no longer log any messages. The MSIHANDLE is eight, and the result from MsiProcessMessage is zero - means no action taken. Is the change of handle just a coincidence? I tried using '1' for the handle always (of course, just as a test), and it still doesn't work. Handle one must have been closed somewhere along the line. Can someone please shed some light on this? -- View this message in context: http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/Unable-to-log- through-DLL-using-MsiProcessMessage-tp709471p5187681.html Sent from the wix-users mailing list archive at Nabble.com. ---------------------------------------------------------------------------- -- ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users
