Win32: How to enumerate child processes?

What's the best way to enumerate the child processes of the currently running process under Win32? I can think of a couple of ways to do it, but they seem overly complicated and slow. Here's the requirements for the solution:

1. Specifically I need to know if any there are any processes currentl开发者_如何学Goy running which were started by the current process.
2. Will be running on WinXP and should not require distributing special DLL's.
3. Should not require a lot of CPU overhead (it will be running periodically in the background).
4. I'll eventually be writing this in Delphi, but I can convert from whatever language you have the code in. Mostly I'm looking for the most efficient set of Win32 API's to use.

Thanks!

You could use the toolhelp API

#include <tlhelp32.h>

Process32First() 

And loop using

Process32Next()

http://www.codeproject.com/KB/threads/processes.aspx

EDIT delphi

uses tlhelp32;

procedure FillAppList(Applist: Tstrings); 
var   Snap:THandle; 
        ProcessE:TProcessEntry32; 
begin 
     Applist.Clear; 
     Snap:=CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0); 
     ProcessE.dwSize:=SizeOf(ProcessE); 
     if Process32First(Snap,ProcessE) then 
     begin 
          Applist.Add(string(ProcessE.szExeFile)); 
          while Process32Next(Snap,ProcessE) do 
                 .. compare parent id
      end 
      CloseHandle(Snap); 
end;