If you install an MSI, and the user chooses a different folder to the default, then the uninstall will still remove the installed folder.
So perhaps you are asking something else? Are you asking how to remove a folder created by the execution of the application, that is not actually "installed" by the MSI ?

From the Installation Expert/ File wizard, you can add files to the project, then you can select the files and choose the option to delete them. In the option you can select whether to delete on install, uninstall or both.
This should tackle any content that is not getting removed during uninstall.

There are 2 reasons for the file/folders not getting uninstalled, if there are any files created in that folder during the runtime, try to add *.* to remove file table during install and uninstall.

check if there are any process running which are holding these file (files in use).

Hi EdT,
thanks for your guidances as it was able to remove the directory now but i'm still facing the problem when it has some sub-directories inside, it still unable to be removed......

any advice that could helps me on?

Thanks!

...Google for 'windows installer RemoveFile table'. The first hit will the MSDN article. Read and inwardly digest. Pay particular attention to its use of the word 'empty'.

Then, revise your knowledge about DOS, in particular about removing folders with content.

VBScab is correct in his usually subtle way.

If you have a tree of files and directories, you need to delete the content in exactly the same way as you would from a DOS prompt. If you know the entire structure you need to remove, then you need to include it in your RemoveFile table folder by folder.
From my observation, the RemoveFile table works from the top down, so you need to organise the entries so that the files at the bottom of the directory tree appear first, then the folders.

  Hi VBScab & EdT,

There are plenty of "Deltree" vbscripts to be found by googling. Use one of these to nuke your folders by running it as a custom action, with a condition of REMOVE="ALL" so that it runs only on uninstall.
You can also consider using wildcard characters in your RemoveFile table entries for removing all files in a folder. That will work too, but if you have an unknown folder structure then a vbscript as above is really the best solution.

I did found the same issue with some applications. i had used the remove file table, as well as wise script custom action to cleanup the files, make sure that you are not deleting any files related/required for the user. in some cases if the application is still running the background such as quick launch it will not remove those folder are files and some times folders are created on the fly, if that is the case add them to the create folder table in that way they get uninstall during uninstall.

I have written a VBScript CA to recursively delete the files/folders. But it fails on Vista (I guess due to UAC). Can I know where should I place this CA in sequence table so that it will run in elevated mode??

You need to sequence any custom action that are making system changes in deferred execution.

I have a similar problem :I am trying to make a checkbox on a dialog  during the uninstalation that asks the user if to delete a directory directory and it's content.  So if the checkbox is checked the folder should be deleted . if it is not checked the folder should remain on the machine.  Any ideea how can i do it ?
I am using Wise instalation studio 7.0

...all the information you need is in the help file. Hit F1 in the Dialog Editor.

How you do it depends on whether the directory and its content is part of the original installation or not. If it is part of the original installation, then it is going to get removed during uninstall regardless of your dialog.
However, I recommend you open a new thread with this issue.