Hi Peter, Thanks a lot for the information. MsiSourceListAddSource is the way to go.
Thanks, Miaohsi -----Original Message----- From: Peter Shirtcliffe [mailto:pshirtcli...@sdl.com] Sent: Tuesday, May 24, 2011 1:42 AM To: General discussion for Windows Installer XML toolset. Subject: Re: [WiX-users] What registry keys/values to modify LastUsedSource There are a group of MSI API functions to handle source locations such as http://msdn.microsoft.com/en-us/library/aa370395%28v=vs.85%29.aspx As usual, it's better to use the functions provided rather than rely on (presumably) undocumented registry keys in order to isolate yourself from possible differences between OSes. -----Original Message----- From: Wang, Miaohsi [mailto:miaohsi.w...@invensys.com] Sent: 23 May 2011 23:29 To: General discussion for Windows Installer XML toolset. Subject: [WiX-users] What registry keys/values to modify LastUsedSource Dear All, After searching on the Internet, I'm still not sure about the exact registry keys/values to modify such that future Repair/Modify will use the msi that we cache locally on the machine hard drive. So far I have found value name LastUsedSource under the following two keys: HKEY_CURRENT_USER\Software\Microsoft\Installer\Products\[product guid]\SourceList HKEY_CLASSES_ROOT\Installer\Products\[compressed product guid]\SourceList If you know which keys/values I should modify, please let me know. Also, once the keys/values are identified, should I modify the LastUsedSource value directly or should I use some sort of Windows Installer API, such as ForceSourceListResolution, to update them? Your help will be greatly appreciated. Thanks, Miaohsi *** Confidentiality Notice: This e-mail, including any associated or attached files, is intended solely for the individual or entity to which it is addressed. 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