Sets the current extended styles of a list view control.
DWORD SetExtendedStyle( 
   DWORD dwNewStyle  
);
Parameters
- dwNewStyle
A combination of extended styles to be used by the list view control. For a descriptive list of these styles, see the Extended List View Styles topic in the Windows SDK. 
Return Value
A combination of the previous extended styles used by the list view control.
Remarks
This member function implements the behavior of the Win32 macro, ListView_SetExtendedListViewStyle, as described in the Windows SDK.
Example
// Allow the header controls item to be movable by the user.
    m_myListCtrl.SetExtendedStyle
        (m_myListCtrl.GetExtendedStyle()|LVS_EX_HEADERDRAGDROP);
Requirements
Header: afxcmn.h