Understanding of WMI process killing script - vbscript

Question

I found this script on your site. I am still very new to VB, I would like to see if someone could explain this script to me. I need to know where to enter the process and what this is doing.
Sub KillProc( myProcess )
'Authors: Denis St-Pierre and Rob van der Woude
'Purpose: Kills a process and waits until it is truly dead
Dim blnRunning, colProcesses, objProcess
blnRunning = False
Set colProcesses = GetObject( _
"winmgmts:{impersonationLevel=impersonate}" _
).ExecQuery( "Select * From Win32_Process", , 48 )
For Each objProcess in colProcesses
If LCase( myProcess ) = LCase( objProcess.Name ) Then
' Confirm that the process was actually running
blnRunning = True
' Get exact case for the actual process name
myProcess = objProcess.Name
' Kill all instances of the process
objProcess.Terminate()
End If
Next
If blnRunning Then
' Wait and make sure the process is terminated.
' Routine written by Denis St-Pierre.
Do Until Not blnRunning
Set colProcesses = GetObject( _
"winmgmts:{impersonationLevel=impersonate}" _
).ExecQuery( "Select * From Win32_Process Where Name = '" _
& myProcess & "'" )
WScript.Sleep 100 'Wait for 100 MilliSeconds
If colProcesses.Count = 0 Then 'If no more processes are running, exit loop
blnRunning = False
End If
Loop
' Display a message
WScript.Echo myProcess & " was terminated"
Else
WScript.Echo "Process """ & myProcess & """ not found"
End If
End Sub