Basically, I know that the following registry key contains the directory I want and that it is consistent over Excel 2002/XP, Excel 2003 and Excel 2007 (same GUID for all three versions). HKCR\CLSID\{00024500-0000-0000-C000-000000000046}\LocalServer32 The value of this registry key is something like: C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE /automation I just want the directory put into another MSI property, so I can copy another file (Excel.exe.config) to that same directory during my WiX/MSI installation. Hi, you might use a RegistrySearch for HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\excel.exe if you only need the active excel application <Property Id="EXCELDIR"> <RegistrySearch Id="ExcelDirSearch" Root="HKLM" Key="SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\excel.exe" Name="Path" Type="raw" /> </Property> If you need others you could use "Path" value on following registry keys: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\10.0\Excel\InstallRoot HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\11.0\Excel\InstallRoot HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0\Excel\InstallRoot hth Dominik -- View this message in context: http://n2.nabble.com/Re%3A-How-to-grab-directory-of-Excel.exe-during-installation-tp2642487p2642487.html Sent from the wix-users mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. Register today. Use priority code J9JMT32. http://p.sf.net/sfu/p _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users