I think that library from Google code will do the job: http://code.google.com/p/sendkeys-ctypes/
Check that link also for a sample code:
http://win32com.goermezer.de/content/view/136/254/
import win32com.client
shell = win32com.client.Dispatch("WScript.Shell")
shell.Run("outlook")
shell.AppActivate("Outlook")
shell.SendKeys("^o", 0) # 1 für Pause = true 0 für nein
shell.SendKeys("^a", 0)
shell.SendKeys("^c", 0)