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Q250276: HOWTO: Do Right-to-Left and Left-to-Right Mirroring in Win2000

Article: Q250276
Product(s): Microsoft Windows NT
Version(s): WINDOWS:
Operating System(s): 
Keyword(s): _IK kbOSWin2000 kbGrpDSIntl kbDSupport
Last Modified: 25-OCT-2000

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The information in this article applies to:

- Microsoft Windows 2000 Advanced Server 
- Microsoft Windows 2000 Server 
- Microsoft Windows 2000 Professional 
- Microsoft Win32 Software Development Kit (SDK) 
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SUMMARY
=======

On a Windows 2000-based computer, you can dynamically change the application
user interface from left-to-right to right-to-left.

MORE INFORMATION
================

This can be accomplished by using the following code:

    // Use ANSI versions of GetWindowLong() and SetWindowLong() because 
              // Unicode is not needed for these calls.
              lExStyles = GetWindowLongA(hWnd, GWL_EXSTYLE) ;

              // Check whether new layout is opposite the current layout.
              if(!!(pLState->IsRTLLayout) != !!(lExStyles & WS_EX_LAYOUTRTL)) 
              {
                 // The following lines update the application layout to 
                  // be right-to-left or left-to-right, as appropriate.
                  lExStyles ^= WS_EX_LAYOUTRTL ; // Toggle layout.

                  SetWindowLongA(hWnd, GWL_EXSTYLE, lExStyles) ;
                  // This is to update layout in the client area.
                  InvalidateRect(hWnd, NULL, TRUE) ;
              }

Additional query words:

======================================================================
Keywords          : _IK kbOSWin2000 kbGrpDSIntl kbDSupport 
Technology        : kbwin2000AdvServ kbwin2000AdvServSearch kbwin2000Serv kbwin2000ServSearch kbwin2000Search kbwin2000ProSearch kbwin2000Pro kbWin32SDKSearch kbAudDeveloper kbSDKSearch kbWinAdvServSearch kbWin32sSearch
Version           : WINDOWS:
Issue type        : kbhowto

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