Batch file active window scripting?

Hi,

I'm a little new at this scripting stuff...What i need to do  is use the windows scheduler to schedule to open Lotus Notes Application off hours. It opens with an active window asking for a password. I need to just send the password and it will open. I'm not sure how to go about getting past the password part...

I figured I could just use a simple command line batch file to do this, but is it possible to send key strokes to an active window using this??? Any direction anyone could give me would be so great. Thanks ...