Understanding CDockablePane

/* 
 * Developed by Huzifa Terkawi 
 * http://www.codeproject.com/Members/huzifa30
 * All permission granted to use this code as long as you retain this notice
 * and refere to orginal Material when part of this code is re-puplished
*/
#ifndef SPLITE_PANE_H_F6D215EE35D24DD4BA5351ECDC86E4FD
#define SPLITE_PANE_H_F6D215EE35D24DD4BA5351ECDC86E4FD

class CPaneSplitter : public CSplitterWndEx
{
public :
	BOOL AddWindow(int row, int col, CWnd* pWin,CString clsName, 
	DWORD dwStyle,DWORD dwStyleEx, SIZE sizeInit);
};

class CSplitePane : public CDockablePane
{
	DECLARE_DYNAMIC(CSplitePane)
	DECLARE_MESSAGE_MAP()
public:
	CSplitePane();
	virtual ~CSplitePane();
protected:
	afx_msg int OnCreate(LPCREATESTRUCT lp);
	afx_msg void OnSize(UINT nType,int cx,int cy);
	afx_msg void OnToolbarCmd(UINT cmd);
private :
	CMFCShellTreeCtrl m_wndTree ;
	CMFCShellListCtrl m_wndList ;
	CPaneSplitter m_wndSplitter;
	CPaneToolBar m_wndToolbar;
};

#endif