Task Manager

I'm designing a task manager that surpasses windows current fucntions. I'm usint the enumwindows api to enumerate a list of the window's names.
I filter out all the windows that have a null("") name and the ones that don't have a window but I am still left with more windows than the task manager.

Ex.

My task manager:

End
Winows NT Task Manager
Jaymz's Process Manager
VB Q and A - Post New Thread - Microsoft Internet Explorer (focused)
VB Q and A - Terminating a program - Microsoft Internet Explorer
Project1
Project1 - Microsoft Visual Basic[run] - [Form1 (Code)]
Project1 - Microsoft Visual Basic[run]
Novell-deliverd Applications for JamiBaro.STU1.JP

Windows task manager:
VB Q and A - Post New Thread - Microsoft Internet Explorer VB Q and A - Terminating a program - Microsoft Internet Explorer
Project1
Project1 - Microsoft Visual Basic[run]
Novell-deliverd Applications for JamiBaro.STU1.JP

notice how windows doesn't show some of the windows
how do i mimic what windows has discrimated against?