Ant Exec(scp) on Windows Os ?

I have Ant Script like this:

<exec command="scp -i ${dev.ssh.id} test.azw2 root@kindle:/mnt/us/documents/"/>

But i am using windows os not linux, so it cant run this chunk under windows os.
I think ant using command shell of default operating system and windows's cmd hasnt got scp support. i dont know what does it means dev.ssh.id on windows.

:help: