memory leak detection

Hello I have tried according to manual detect wheather I have some memory leak but it is quite confusing.

For example: The documentation says to watch the amount of available memory before runing my app and after I cloce my app. Saying that it should be the same …well it never comes back to same amount even if I dont run my app( i tried hot edit instead)and the memory went down and never came back for instance after i closed Hot Edit window. It kept comming down from 17666048 to 17657856.
Then I tryed to run my app and it went down to 17240064 and kept going down (to 17022976 ). Can somebody help me with this? How can I detect the memory leak?
I even tried the second way with logging off and checking the number of instances but it behave the same for app where I on purpose did not use dispose as for the one where i used it.
Both logs the first and the second ways of detecting are attached.
webwiz/323/Logs.zip

An easy way to detect memory leaks is, if you use a virtual controller, to run DebugView (a free tool from SysInternal)that displays any debug error message. You will be able to see what type of object is not disposed properly.

Thank you very much for the answer!

I have downloaded the debugview but i don’t know how exactly to use it. Could you please help me with that? Some example ? Like what do i see if there is a memory leak. Thank you