is there a way to clear macros from a vbscript

[Chudson]

I am trying to clear or delete a macro and then reuse it.
I have tried setting the macro to ""
vbld_AllMacros.Item("filename").value = ""
but this results in a tab character then the value

ex:
instead of:
c:\test.txt
I get
c:\test.txt


I also have tried settting the value to null and that didnt work.

Thanks in advance.
Chris