C / C++ / MFC

class CYourButton : public CButton
{
// Construction
public:
	CYourButton();

// Attributes
public:

// Operations
public:

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CYourButton)
	//}}AFX_VIRTUAL

// Implementation
public:
	virtual ~CYourButton();

	// Generated message map functions
protected:
	//{{AFX_MSG(CYourButton)
	afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	//}}AFX_MSG

	DECLARE_MESSAGE_MAP()
};

/////////////////////////////////////////////////////////////////////////////
// CYourButton

CYourButton::CYourButton()
{
}

CYourButton::~CYourButton()
{
}

BEGIN_MESSAGE_MAP(CYourButton, CButton)
	//{{AFX_MSG_MAP(CYourButton)
	ON_WM_LBUTTONDOWN()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CYourButton message handlers

void CYourButton::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default

	TRACE("> Left mouse button down\n\r");	// This line has been manually added.

	CButton::OnLButtonDown(nFlags, point);
}