If you need to delete leftovers from a program during uninstall / removal of an MSI Package, go ahead reading this post.

• Add this VBS Script to the Binary Table and call it DeleteFolderVbs (Column Name)
• Add the DeleteFolderVbs to the CustomAction Table, set the properties as follows:
  • Action = DeleteFolderVbsCA
  • Type = 6
  • Source = DeleteFolderVbs
• Add the Action DeleteFolderVbsCA with Condition set to REMOVE=”ALL” to the InstallExecuteSequence with Sequence set to 6500

'==========================================================================
' NAME: DeleteDirectory.vbs
'
' AUTHOR:  www.christiano.ch
' DATE  : 20100811 (YYYYMMDD)
'
' COMMENT: removes directory 
'
' USAGE / Syntax: DeleteDirectory.vbs 
' 
' CHANGE HISTORY:
' .........................................................................
' DATE of Change        Who             	What
' -------------------------------------------------------------------------
' 20100811 				Christian Muggli	Created
'==========================================================================

Option Explicit
On Error Resume Next

' Constants
' msiMessageType
Public Const msiMessageTypeFatalExit = &H00000000 '// Premature termination, possibly fatal out of memory.
Public Const msiMessageTypeError = &H01000000 '// Formatted error message, [1] is message number in Error table.
Public Const msiMessageTypeWarning = &H02000000 '// Formatted warning message, [1] is message number in Error table.
Public Const msiMessageTypeUser = &H03000000 '// User request message, [1] is message number in Error table.
Public Const msiMessageTypeInfo = &H04000000 '// Informative message for log, not to be displayed.
Public Const msiMessageTypeFilesInUse = &H05000000 '// List of files in use that need to be replaced.
Public Const msiMessageTypeResolveSource = &H06000000 '// Request to determine a valid source location.
Public Const msiMessageTypeOutOfDiskSpace = &H07000000 '// Insufficient disk space message.
Public Const msiMessageTypeActionStart = &H08000000 '// Start of action,
' own
Public Const strLogFilePrefix = "Custom Error Logging Framework: "

WriteToMsiLog "Custom Script with Name: " & WScript.ScriptName & " started"

Dim oFSO : Set oFSO = CreateObject("Scripting.FileSystemObject")
Dim lRet, strFolder
strFolder = Session.Property("TARGETDIR")
WriteToMsiLog "determined TARGETDIR.. Resolved to: " & strFolder
strFolder = MakePath(strFolder)
If strFolder <> "" Then
	If oFSO.FolderExists(strFolder) Then
		WriteToMsiLog "Path: " & strFolder & " exists - will try to delete it.."
		lRet = oFSO.DeleteFolder(strFolder,True)
		WriteToMsiLog "Deleting Path: " & strFolder & " seems to be successful."
	End If
End If

Function WriteToMsiLog(strMessage)
	Dim objMessage
	Set objMessage = Session.Installer.CreateRecord(0)
	objMessage.StringData(0) = strLogFilePrefix & strMessage
	'If Session.Property("CUSTDEBUG") <> "" Then MsgBox "Message: " & strMessage
	Session.Message msiMessageTypeInfo, objMessage
End Function

Function MakePath(strPath)
	If Right(strPath, 1) = "\" Then
		WriteToMsiLog "removing last backslash from path"
		strPath = Left(strPath, Len(strPath)-1)
	End If
	MakePath = strPath
End Function