windows Azure slave plugin doubts

[Bharathi Devarasu]

Hi All, 

i am a newbie to jenkins, sorry about this set of questions. 

trying to use windows azure slave plugin, what is the real use of that plugin. 

1. Here windows azure works master or jenkins server works as master?.  again my question may wrong we can create windows azure as master?. 

2. many jenkins slaves are there, we can control that slaves from azure. 

3. some jenkins slaves busy so we can decide which slave have to do the specific job?. 

i will appreciate your help. 

thanks.

Bharathi D