VBScript dictionary delete by index ?

Hello all,

I've got a vbscript Dictionary object, and need to be able to delete a 
key-item pair by its index.  Can it be done and if so, how is it expressed ?

Remark: I can use

oDict.remove oDict.keys()(Index)

, but that takes two steps and is doing more work than is needed (which also 
excludes converting to a pair of arrays and converting it back afterwards by 
the way :-) )

Regards,
Rudy Wieser