Thanks John and Pally for your responses on this. Greatly appreciated! My custom actions is running in InstallUISequence for checking the prerequisite software. The execute attribute is 'immediate' as the action need to be executed before the next dialog box appears.
Thanks Sachin! > Date: Tue, 17 Nov 2009 15:43:39 +0000 > From: pally.sand...@iesve.com > To: wix-users@lists.sourceforge.net; v-sad...@microsoft.com > Subject: Re: [WiX-users] GetMsiProperty with UAC enabled! > > John that doesn't necessarily generate a UAC prompt. It will simply > check if the user has the permissions necessary to generate a UAC prompt > before the MSI installs. > > Sachin is your custom action running during the InstallUISequence or > InstallExecuteSequence? What is the Execute attribute of the > CustomAction? > Generally you won't see an elevation prompt until you start the > InstallExecuteSequence (as in after you click "Install" on the > ProgressDlg) so if it runs before that in the InstallUISequence you > probably want to move it if possible (as always check a verbose log). > You also probably want it to have Execute="deferred" set as per > http://wix.sourceforge.net/manual-wix3/wix_xsd_customaction.htm If it's > set to "immediate" or not at all it's likely this is the cause of the > problem. > > This is all assuming your call to GetMsiProperty function really does > requires UAC elevation. I haven't looked at this function myself so I'd > first check if that is the case before you start trying to change your > WiX code as your changes may be unnecessary if the Custom Action itself > is the problem. > > Palbinder Sandher > Software Deployment & IT Administrator > T: +44 (0) 141 945 8500 > F: +44 (0) 141 945 8501 > > http://www.iesve.com > **Design, Simulate + Innovate with the <Virtual Environment>** > Integrated Environmental Solutions Limited. Registered in Scotland No. > SC151456 > Registered Office - Helix Building, West Of Scotland Science Park, > Glasgow G20 0SP > Email Disclaimer > > > -----Original Message----- > From: John H. Bergman (XPedient Technologies) > [mailto:john.berg...@xpedienttechnologies.com] > Sent: 17 November 2009 15:24 > To: General discussion for Windows Installer XML toolset.; > v-sad...@microsoft.com > Subject: Re: [WiX-users] GetMsiProperty with UAC enabled! > > Add this, maybe it will help in your case... > > <Condition Message="You must be an administrator to install this > application"> > Privileged > </Condition> > > I believe you get the UAC prompt... > > -----Original Message----- > From: Sachin Dubey [mailto:sachin.du...@live.com] > Sent: Tuesday, November 17, 2009 1:35 AM > To: wix-users@lists.sourceforge.net; v-sad...@microsoft.com > Subject: [WiX-users] GetMsiProperty with UAC enabled! > > > Hi All, > > > > I am trying to fix a bug in an existing Wix MSI code, the MSI fails on > Windows 2008 with UAC Enabled, if we disable the UAC the MSI runs fine. > > During investigation I found, the Wix is calling C++ custom actions > those using method GetMsiProperty to retrieve the properties from MSI. > > > > The code fails during calling this method if the UAC is enabled. > > > > Does it require specific permissions to call this method or something > else going wrong? > > > > Code fails at: > > hr = GetMsiProperty(PREREQUISITE1, &pwszCADataPreReq1, &cchDataPreReq1); > > > > Appreciate any help on this. > > > > Thanks > > Sachin! > > > > _________________________________________________________________ > Windows 7: It works the way you want. 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