How to perform complete scan(both memory and all drives) through command line..?

we can perform scanning for single drive using the following command,

clamscan.exe --database="C:\Program Files\ClamWin\db" --recursive C:\,,

but i want to scan all drives and memory using command line..?

Let me know any suggestions..

Thanks
Vijay

--memory c: d: e: f:
clamscan currently does not known about drives

Thank u for your immediate response.

I want one more information, For silent mode installation i have used the following command,

Path + ClamWinSetup.exe /sp- /silent /norestart, its working fine but Some GUI (i.e Updating database screen) shown,
i dont want this screen, Let me know the command line argument for silent installation without updation database screen.

Thank You
Vijay