List of Application in Applications Tab in Task Manager

Question

Hi guys,

I'm a novice to programming. Am happy to be here. This is my first post in a forum and happy to be here. 

My question is regarding how can i get a list of all applications in Task Manager in Applications Tab. 

I used System.Diagonistics.Process class and used the condition p.mainWindowTitle.Length >1 to get main window title of all processes. 

But certain processes may have multiple windows in my case. You can see it by opening calc in windows and going to Help -> Help topics

Now when i use the above class, i couldn't get the handle of this help window.. But it'll be present in task manager list. Both calculator and calculator help are from calc.exe process... 

Is there anyway to get all windows associated with a single process..??