memory issue

Here is my situation.

At startup of my application, my app utilized 25MB of RAM. During run time,
it automatically gone up to 50MB, which makes senses. However, after I clear
out all of my data trees, reset everything, back to the beggining page. I
still see 50MB stuck in Windows Task Manager. Yes, I am very positive I have
dump all of my data container. No other 3rd party executable invoked my app
is running either. It shouldn't automatically reset its memory usuage back
to 25MB, right? But strangely, it doesn't. Could someonse please tell me if
there is a default dll I could call to automatically strip away those
memories not being used?

Thanks,
Ban
.

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