Send Keys to minimized PW-Window

I want to learn how to send keys to a PW-Window, but it is minimized (because of the other functions my prog has)..
i am programming in vb.net (i know.. not the best language but i am getting along with it quite good) so if anyone knows a simple function or can help me with this.. pls tell me :)

greetz

I can't do a sendkey with C# >_> Trying, like I can send keys to every app window EXCEPT PWI. It's super annoying.

i have tried it to, iam coding in delphi, but sendmessage, postmessage and so on doesnt work, only Keybd_event works, but there for the PW window must be in focus....

i finally did it..
it works with sendmessage, with vb.net ^^
if anyone's interested in the declaration necessary for sending keys to the window PM me