A Logging Listbox Control

#if !defined(AFX_LOGFRAME_H__319C7EF0_D94C_11D3_9FE9_006067718D04__INCLUDED_)
#define AFX_LOGFRAME_H__319C7EF0_D94C_11D3_9FE9_006067718D04__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// LogFrame.h : header file
//

/////////////////////////////////////////////////////////////////////////////
// CLogFrame frame

class TraceEvent;

class CLogFrame : public CMDIChildWnd
{
	DECLARE_DYNCREATE(CLogFrame)
protected:
	CLogFrame();           // protected constructor used by dynamic creation

// Attributes
public:

// Operations
public:
        int AddString(TraceEvent *);
// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CLogFrame)
	protected:
	virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
	//}}AFX_VIRTUAL

// Implementation
protected:
	virtual ~CLogFrame();

	// Generated message map functions
	//{{AFX_MSG(CLogFrame)
	afx_msg void OnSize(UINT nType, int cx, int cy);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

class CLogger {
    public:
       // This is the only member that is normally used
       int AddString(TraceEvent * event);
    public: // Constructors
       CLogger() { frame = NULL; }
       virtual ~CLogger() {}

    public:
       // These methods are useful during creation
       BOOL IsValid() { return frame != NULL && ::IsWindow(frame->m_hWnd); }
       void MDIActivate() {if(IsValid()) frame->MDIActivate(); }
       BOOL IsIconic()    {if(IsValid()) return frame->IsIconic(); else return FALSE; }
       void ShowWindow(UINT show) { if(IsValid()) frame->ShowWindow(show); }
       void SetLogger(CLogFrame * f) { frame = f; }
    protected:
       CLogFrame * frame;
};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_LOGFRAME_H__319C7EF0_D94C_11D3_9FE9_006067718D04__INCLUDED_)