How get a Active Script variable with VBScript

Dear all.

I would like to know if possible get a active script variable value, by example {app} and  hold it in a
VBScript variable.

I have tried in this way
<SCRIPT language="vbscript">
Dim ruta
ruta=[={app}]

</SCRIPT>

but that doesn't work.

PD. I have the preprocessor enabled.

Thanks in advance,

You can also do

JavaScript

&lt;script&gt;
v = window.external.ActivGet('app') ;
</SCRIPT>

I am not an expert on VBscript, but same idea should work, something like