Child window to parent window notification problem

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C++

Windows

Hi all.
I have a class:

CMyClass : public CWnd
{
...
HWND		m_hImageWindow;
CBitmapButton   m_HelpButton;

afx_msg void OnHelpBtnClick();
afx_msg LONG OnPictureClick( WPARAM wParam, LPARAM lParam );
afx_msg void OnTimer( unsigned int id ) ;
...
}
...
BEGIN_MESSAGE_MAP(CMyClass, CWnd)
...
  ON_WM_TIMER()
  ON_BN_CLICKED( 1, OnHelpBtnClick )
//How can I implement the message handler for the window I created in 
OnTimer function? the fiollowing line does not work
  ON_MESSAGE(MESSAGE_ID, OnPictureClick) 
...
END_MESSAGE_MAP()

...
afx_msg int CMyClass::OnCreate( LPCREATESTRUCT )
{
  RECT rc;
  SetRect( &rc, 100, 100, 120, 120 );
  m_HelpButton.Create( 0, WS_VISIBLE | BS_OWNERDRAW, rc, this, 2 );
  m_HelpButton.LoadBitmaps( IDB_BITMAP2, IDB_BITMAP3 );
}

afx_msg void CMyClass::OnTimer( unsigned int id )
{
  if( m_hImageWindow )
  {
	  ::DestroyWindow( m_hImageWindow );
	  m_hImageWindow = NULL;
  }

  void* init = GetProcAddress( LoadLibrary( "atl" ), "AtlAxWinInit" );
  _asm call init;
  m_hImageWindow = CreateWindow( "AtlAxWin", somePictureURL,
	  WS_CHILDWINDOW | WS_VISIBLE, 0, 0, 100, 100,
	  this->GetSafeHwnd(), (HMENU)(UINT_PTR)MESSAGE_ID, (HINSTANCE)GetWindowLong( this->GetSafeHwnd(), GWL_HINSTANCE ), 0 );
}

afx_msg void CMyClass::OnHelpBtnClick()
{
}

afx_msg LONG OnPictureClick( WPARAM wParam, LPARAM lParam );
{
}
...

Can anybody tell me how I can implement the message handler for the window I created in OnTimer() and attach to this message handler the function OnPictureClick()?

Nelek: just format code