A Simple way to switch from one menu set to another

Basic Purpose

I spent a couple hours today looking for a simple way to change from one set of menus (file, edit, etc.) to another menu set. I came across this code in MSDN, but I didn't see anything like it here on CodeProject, so this is my first article post. I hope someone might find it useful.

How to Use

1. Create multiple Menu resources in the resource view. The two I will use are IDR_MAINFRAME and IDR_OTHERMENU.
2. Declare the function in your MainFrame.h (or some other CFrameWnd derived class)

private:
  void ReplaceMenu(UINT n_IDResource);

3. Add the following to your MainFrame.cpp

void CMainFrame::ReplaceMenu(UINT n_IDResource)
{
   CMenu NewMenu; // create the new CMenu variable
   NewMenu.LoadMenu(n_IDResource); 
      // Load the menu from the resource passed
   ASSERT(NewMenu);

   // Remove and destroy the old menu
   SetMenu(NULL);
   ::DestroyMenu(m_hMenuDefault); 
      // m_hMenuDefault is the menu member variable of CFrameWnd

   // Set the menu to the new menu we created
   SetMenu(&NewMenu);

   // Set the default menu handler to the handle of our new menu
   m_hMenuDefault = NewMenu.GetSafeHmenu();
}

4. Use the function wherever you need just by calling the function passing it the menu resource to use

ReplaceMenu(IDR_OTHERMENU);

Conclusion

You still implement your message map the same way. Although I would suggest prefixing your menu-set's menu functions differently (ex. OnView1TestMe(), OnView2TestMe()) so you can easily tell which functions are for which menu set. Please keep in mind this is my first article, feed back will be read but just take it easy on me I've done a lot of work with split views and replacing views and printing different views and such in split views. I hope to write another article on that stuff in a few months.

-dz [www.dzgraphics.com]

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