C / C++ / MFC

#pragma once   
#include "LToolDoc.h" 
#define MYWM_NOTIFYICON     (WM_USER+2)   
  
class CMainFrame : public CFrameWnd   
{   
protected: // create from serialization only   
    CMainFrame();   
    DECLARE_DYNCREATE(CMainFrame)   
// Attributes   
public:   
  
// Operations   
public:   
  
// Overrides   
public:   
    virtual BOOL PreCreateWindow(CREATESTRUCT& cs);   
    LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);   
  
// Implementation   
public:   
    virtual ~CMainFrame();   
#ifdef _DEBUG   
    virtual void AssertValid() const;   
    virtual void Dump(CDumpContext& dc) const;   
#endif   
  
protected:  // control bar embedded members   
    CStatusBar  m_wndStatusBar;   
    CToolBar    m_wndToolBar;   
  
// Generated message map functions   
protected:   
    afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);   
    DECLARE_MESSAGE_MAP()   
public:    
    virtual BOOL PreTranslateMessage(MSG* pMsg);   
};  

BOOL CMainFrame::PreTranslateMessage(MSG* pMsg)   
{   
    // TODO: Add your specialized code here and/or call the base class   
//  return CFrameWnd::PreTranslateMessage(pMsg);       
           
    CWnd* pWnd = AfxGetMainWnd();   
    if(pWnd == NULL)   
        return FALSE;   
  
    ASSERT_VALID(pWnd);   
    ASSERT_KINDOF(CFrameWnd, pWnd);   
    CFrameWnd* pMainFrame = static_cast<cframewnd*>(pWnd);   
  
    CFrameWnd *pActiveFrame = pMainFrame->GetActiveFrame();   
    if(pActiveFrame == NULL)   
        return FALSE;   
       
    CLToolDoc *pDoc = (CLToolDoc *)pActiveFrame->GetActiveDocument();   
  
    pDoc->TranslateMessage(pMsg);   
       
    return TRUE;   
} 

void CLToolDoc::TranslateMessage(MSG* pMsg)   
{    
  if(pMsg->message == USER_DEFINED_MESSAGE_1){   
     // Do Sometheing...}   
  else if(pMsg->message == USER_DEFINED_MESSAGE_2){   
     // Do Sometheing...)}   
  else if(pMsg->message == USER_DEFINED_MESSAGE_3){   
     // Do Sometheing...)}   
  else{}   
}