(To be complete) this is what can be done: CRect rect; m_wndSplitter.GetClientRect(rect); CSize splitter_size = m_wndSplitter.GetSplitterSize(); CSize border_size = m_wndSplitter.GetBorderSize(); int row_height = rect.Height() - ((splitter_size.cy * (m_rows - 1)) + (border_size.cy * 2)); int col_width = rect.Width() - ((splitter_size.cx * (m_cols - 1)) + (border_size.cx * 2)); row_height /= m_rows; col_width /= m_cols; for (int i = 0; i < m_rows; i++) { m_wndSplitter.SetRowInfo(i, row_height, 100); } for (int j = 0; j < m_cols; j++) { m_wndSplitter.SetColumnInfo(j, col_width, 100); } m_wndSplitter.RecalcLayout(); Regards Mahendra

One problem I see in your example is the line delete pPt;. This line won't work correctly. Since pPt is a void pointer, the compiler won't know which delete operator and destructor to call. This will lead to memory leaks and possibly heap corruption. A better approach would be: while (!m_points.IsEmpty()) { MyType *pPt = (MyType *)m_points.RemoveHead(); delete pPt; } In this case, MyType is the type of the value pointed to by members of the list. If you use a CTypedPtrList<>, you can delete the contents of a list more simply as follows: CTypedPtrList<MyType> m_points; //... while (!m_points.IsEmpty()) { delete m_points.RemoveHead(); } Using CTypedPtrList you don't need type casts. Software Zen: delete this;