Shoutbox

I haven't worked on Interop.Allocate calls yet, but I'm trying to learn
I don't know how to create a structure...
I need:
WINDOWPLACEMENT {
   INT length;
   INT flags;
   INT showCmd;
   POINT ptMinPosition;
   POINT ptMaxPosition;
   RECT rcNormalPosition;
}

And I believe POINT is:
POINT {
   INT x
   INT y
}

If someone could give me a tut or something I would be most gratefull

I need this for GetWindowPlacement...