title: Getting control of other window
body: <p>I have a project in MFC which is integrated with a billing application.We have two seperate MFC window:
  1)One for Billing App. and other for
  2)the project.</p>
  
  <p>Initially we log in with the project window.then we start transaction with the project window.after transaction we need to click a button on Billing Application,but the focus is still on the project window.How can we set the focus/KeyPressEvent to the Billing App?</p>
  
  <p>Thanks,
  ksh</p>