How Can Refreshes Which Doesn't Look Professional

Today I'm having a play around with VB.NET and looking at making a little Task Manager kind of

thing; I've completed the little bits like populating the running processes and such, but noticed

that on the Task Manager provided by Microsoft, the Memory updates at a regular interval butnothing

else refreshes, where when I try and reload the running processes to get the updated memory usage,

the whole thing refreshes which doesn't look professional.Also, while I'm on the subject - how can

I make a DLL call to "kernel32.dll" to gain more access of the processes, IE controlling the

windows and such.