Trigger some vbs code on filename change - vbscript

Question

I would like to be able run some custom vb script code upon filename change (for instance to keep a list of newly created files or the ones which changed their name).
The vbs should be called on every filename change happening within a specified folder.
I know how to do that with a full directory scan but I would like to find a more efficient method, for instance by the mean of a sort of OS hook calling my code.
Any way to do that ?
Thank you,
A.

Answer 1

There are two simple WMI examples, tracing changes for *.txt files in C:\Test\ folder.
First one is for synchronous event processing:
Option Explicit
Dim oWMIService, oEvents, s
Set oWMIService = GetObject("WinMgmts:\\.\root\CIMv2")
Set oEvents = oWMIService.ExecNotificationQuery( _
"SELECT * FROM __InstanceOperationEvent " & _
"WITHIN 1 WHERE " & _
"TargetInstance ISA 'CIM_DataFile' AND " & _
"TargetInstance.Drive = 'C:' AND " & _
"TargetInstance.Extension = 'txt' AND " & _
"TargetInstance.Path = '\\Test\\'")
Do
With oEvents.NextEvent()
s = "Event: " & .Path_.Class & vbCrLf
With .TargetInstance
s = s & "Name: " & .Name & vbCrLf
s = s & "File Size: " & .FileSize & vbCrLf
s = s & "Creation Date: " & .CreationDate & vbCrLf
s = s & "Last Modified: " & .LastModified & vbCrLf
s = s & "Last Accessed: " & .LastAccessed & vbCrLf
End With
If .Path_.Class = "__InstanceModificationEvent" Then
With .PreviousInstance
s = s & "Previous" & vbCrLf
s = s & "File Size: " & .FileSize & vbCrLf
s = s & "Last Modified: " & .LastModified & vbCrLf
End With
End If
End With
WScript.Echo s
Loop
The second is for asynchronous event processing:
Option Explicit
Dim oWMIService, oSink
Set oWMIService = GetObject("WinMgmts:\\.\root\CIMv2")
Set oSink = WScript.CreateObject("WbemScripting.SWbemSink", "Sink_")
oWMIService.ExecNotificationQueryAsync oSink, _
"SELECT * FROM __InstanceOperationEvent " & _
"WITHIN 1 WHERE " & _
"TargetInstance ISA 'CIM_DataFile' AND " & _
"TargetInstance.Drive = 'C:' AND " & _
"TargetInstance.Extension = 'txt' AND " & _
"TargetInstance.Path = '\\Test\\'"
Do
WScript.Sleep 1000
Loop
Sub Sink_OnObjectReady(oEvent, oContext)
Dim s
With oEvent
s = "Event: " & .Path_.Class & vbCrLf
With .TargetInstance
s = s & "Name: " & .Name & vbCrLf
s = s & "File Size: " & .FileSize & vbCrLf
s = s & "Creation Date: " & .CreationDate & vbCrLf
s = s & "Last Modified: " & .LastModified & vbCrLf
s = s & "Last Accessed: " & .LastAccessed & vbCrLf
End With
If .Path_.Class = "__InstanceModificationEvent" Then
With .PreviousInstance
s = s & "Previous" & vbCrLf
s = s & "File Size: " & .FileSize & vbCrLf
s = s & "Last Modified: " & .LastModified & vbCrLf
End With
End If
End With
WScript.Echo s
End Sub
More info on CIM_DataFile instance properties you can find by the link on MSDN.