Creates a new edit control in the button.
virtual CEdit* CreateEdit(
   CWnd* pWndParent,
   const CRect& rect 
);
Parameters
- [in] pWndParent 
 Specifies the parent window of the edit control. It must not be NULL.
- [in] rect 
 Specifies the edit control's size and position.
Return Value
A pointer to the newly created edit control; it is NULL if the control's creation and attachment fail.
Remarks
You construct a CMFCToolBarEditBoxButton Class object in two steps. First call the constructor, and then call CreateEdit, which creates the Windows edit control and attaches it to the CMFCToolBarEditBoxButton object.
Requirements
Header: afxtoolbareditboxbutton.h