C / C++ / MFC

class CMainFrame : public CFrameWnd
{
protected: // create from serialization only
CMainFrame();
DECLARE_DYNCREATE(CMainFrame)

// Attributes
public:
CSplitterWnd m_wndSplitter;

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext) 
{
// TODO: Add your specialized code here and/or call the base class
if (!m_wndSplitter.CreateStatic(this, 1, 2))return FALSE;

if (!m_wndSplitter.CreateView(0, 0, RUNTIME_CLASS(CSdiSplitterView), CSize(100, 100), pContext) ||
!m_wndSplitter.CreateView(0, 1, RUNTIME_CLASS(CMyFormView), CSize(100, 100), pContext))
{
m_wndSplitter.DestroyWindow();
return FALSE;
}
return TRUE;
}