How can i drag and drop another file on top of the VBScript file

I'm running Windoes Vista as my operating system. I would like to know that how can i drag and drop another file on top of the VBScript file? Can any body telll me the exact way of doing it? Does any body knows about it? Kindly provide me the correct logical solution for the above issue. Any kind of help on the above issue would be appreciated.

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Follow the below steps mention.

1) First Right-click/New Shortcut on your desktop.
2) Then enter the target like so: powershell.exe "&{c:\bin\testit.ps1 $args}"
3) Then change testit.ps1 to be your target script that you want to run on your system.
4) Then the file name is passed as parms to the command, which is passed as first parm to the script.
5) When you drag another script onto this icon, it should pass the file name
to the script and you can then do what you want with that file name.