Redirect to another page and carry across the original value.

I am trying to write some rewrite rule where anything which comes thru my website this waywww.mywebsite.com/abcdef should be redirected to  another page where the value is send as a parameter, example: process.aspx?value=abcdef 

UPDATE:

It seems that the code shown below somehow work, just that it appears that my process.aspx is triggered 2x. 

Anything I should change ?

<rewrite><rules><rule name="Rewrite to process"><match url="(.*)"/><action type="Rewrite"  url="Process.aspx?From={R:1}"/></rule></rules></rewrite>