Hi All:   I have made a WIX msi package, and linked a custom action dll 
(custom.dll) into msi, then I copy msi file to test PC, install it. it works 
fine, all custom action is performed correctly, Then I use msiexec.exe /u 
xxxxx--xxxx(Uninstall GUID), it can remove all installed files, I think when 
install, Windows OS should keep my msi into some cache, So when do 
uninstallation, even I use GUID to do uninstallation, Windows can also find the 
msi and uninstall product, So My question is my custom.dll is also cached by 
windows? If user clean some windows temp folder, Can Windows also work 
correctly to uninstall my product? Thanks!                                     
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