title: Parent dialog OnOK() is not getting called on pressing enter key
body: <p>In my  MFC MDI application, I have a modal dialog with CTabctrl. The each  tab page of tabctrl  is loaded with child dialog. When pressing enter key, the OnOK() of parent dialog is not getting called.</p>
  
  <p>How to make it to call onOK() of parent dialog?</p>