How get filename over the upload throught web client?

The variable path may have more than 100 characters when uploading through web site (and in some cases also from local sources). If that is the case the remaining path will be placed in property 77 and if more then 200 characters even in property 78. Your should probably concatenate the displayvalues of those 3 properties before you attempt to extract the filename.

thank you for your advice. But I tried to view the listed properties 75,76 or 77 and they are all blank when uploaded trough the web.

OK, then you probably have to get the filename directly from the file itself using the GetFiles or GetFilesForModificationInEventHandler method.
Something like Vault.ObjectFileOperations.GetFiles(ObjVer).Item(1).Title might work.

thank you very much, just a question, can I call this function "Vault.ObjectFileOperations.GetFiles(ObjVer).Item(1)" directly in the vbs script? Can you please advise me? Thank you in advance

It should go into your script like this:

filename = Vault.ObjectFileOperations.GetFiles(ObjVer).Item(1).Title

I have not tested, but at least this should help you get started.