Weird RAM-behaviour

Hi. Ok, first of all, when I start a simple application made up of a form with only form components, the application takes 17+mb. If I minimize it, the RAM usage drops to 500kb. If I restore it, it takes 2.5mb. And it keeps growing by 8-64kb/s if it's active and I move my mouse around. I've got no timers, only capture doubleclicked & mousedown. I've seen the same behaviour in other programs I've made in VS.NET. Any tips on what to do to keep the RAM imprint as low as possible? Anything I could turn off or clear (like the queue that saves form events)? I made an mp3-player in much the same way with some added functionality, and it just kept growing and growing whether I played a track or not.