The System.Diagnostics.Process class exposes the GetProcesses static method, that returns a list of all running processes. It is quite easy to leverage this feature to display all running processes in a ListBox or ComboBox control:

' This code assume that you've used the following Imports' Imports System.Diagnostics.' Start with an empty ListBox.lstProcesses.Items.Clear()' Display ProcessName property in the list area.lstProcesses.DisplayMember = "ProcessName"' Load info on all running processes in the ListBox control.Dim p As ProcessFor Each p In Process.GetProcesses    lstProcesses.Items.Add(p)Next