Change DateLastModified property of Folder to match file within - vbscript

Question

I have a number of folders, each with files inside the folder.
The structure looks something like this:
Folder.No.1
Folder_No_2
Folder No 3
and the files within are something like:
Folder.No.1\My.Movie.1.mp4
Folder.No.1\My.Movie.1.txt
Folder_No_2\My_Movie_2.mp4
Folder_No_2\My_Movie_2.jpg
Folder_No_2\My_Movie_2.txt
Folder No 3\My Movie 3.mp4
As you can see, some folders contain . in the name, some contain _ and some contain spaces.
The one consistent factor is that each folder will always contain an .mp4 file, regardless of anything else.
Therefore, how can I change the Date Modified date/time of the folder to match that of the .avi file contained within the folder? Can I do this by copying the DateLastModified from the file inside (the child) to the parent folder using VBScript?
So far I am working on something like this:
Dim objShell, objFolder, objFile
Set objFile = CreateObject("Scripting.FileSystemObject")
Set objShell = CreateObject("Shell.Application")
Set objFolder = objShell.NameSpace(strDir)
Set strDir = objFile.GetFolder("C:\Temp")
For Each objFile In objFolder
If UCase(objFolder.GetExtensionName(objFile.Name)) = "MP4" Then
objFolder.Items.Item(strDir).ModifyDate = DateLastModified
WScript.Echo objFolder.Name
End If
Next
but it fails when calling from command line with: cscript CopyDateToParent.vbs
Can anyone please help to correct this to make it work?

Answer 1

Try my code :
StrFolder="C:\Users\admin\Desktop\" 'Your folder
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set objShell = CreateObject("Shell.Application")
Set objFolder = objFSO.GetFolder(StrFolder)
Set Folder = objShell.NameSpace(StrFolder)
Set colFiles = objFolder.Files
For Each objFile in colFiles
Name=objFile.Name
strExtension = LCase(objFSO.GetExtensionName(Name))
If strExtension = "mp4" Then
Set objFolderItem = Folder.ParseName(Name)
objFolderItem.ModifyDate = DateLastModified 'Example : "01/01/2008 8:00:00 AM"
End If
Next