Splitter window in SDI - better explanation

I'm using SDI. Splitter window is working fine (2 panes left & right). I want to use 3 additional splitter windows (different views) each with a left & right pane, calling each with its button on the tool bar. Thus, I want to have 4 splitter windows, each with a left & right pane. I want the frame to view 1 of the 4 splitter windows based on the user pressing one of 4 buttons. Each splitter window will show some data that is contained within the same doc. Apparently, I should use SetActiveView()... I have placed the handler function in my CMainFrame class. Are there any articles or sample apps to guide me? Cannot get view (splitter) to change. Do I need to call OnClientClient & use a CASE statement? Would appreciate any suggestions.
JD