mainfrm.cpp

这是书上的代码

// MainFrm.cpp : implementation of the CMainFrame class
//

#include "stdafx.h"
#include "LoadDynMenu.h"

#include "MainFrm.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

//	类型定义
typedef CMenu* (WINAPI *PAMenu)();
typedef void (WINAPI *PMenuItem)(UINT number);
//	变量
HINSTANCE hDynMenu;
PAMenu AMenu;
PMenuItem MenuItem;

/////////////////////////////////////////////////////////////////////////////
// CMainFrame

IMPLEMENT_DYNCREATE(CMainFrame, CFrameWnd)

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
	//{{AFX_MSG_MAP(CMainFrame)
	ON_WM_CREATE()
	ON_COMMAND(ID_SLA, OnSla)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

static UINT indicators[] =
{
	ID_SEPARATOR,           // status line indicator
	ID_INDICATOR_CAPS,
	ID_INDICATOR_NUM,
	ID_INDICATOR_SCRL,
};

/////////////////////////////////////////////////////////////////////////////
// CMainFrame construction/destruction

CMainFrame::CMainFrame()
{
	// TODO: add member initialization code here
	
}

CMainFrame::~CMainFrame()
{
	FreeLibrary(hDynMenu);
}

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | WS_VISIBLE | CBRS_TOP
		| CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | CBRS_SIZE_DYNAMIC) ||
		!m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
	{
		TRACE0("Failed to create toolbar\n");
		return -1;      // fail to create
	}

	if (!m_wndStatusBar.Create(this) ||
		!m_wndStatusBar.SetIndicators(indicators,
		  sizeof(indicators)/sizeof(UINT)))
	{
		TRACE0("Failed to create status bar\n");
		return -1;      // fail to create
	}

	//	加载含动态菜单的DLL文件
	hDynMenu=LoadLibrary("DynMenu.dll");
	MenuItem=(PMenuItem)GetProcAddress(hDynMenu,"MenuItem");
	AMenu=(PAMenu)GetProcAddress(hDynMenu,"AMenu");

	m_bAutoMenuEnable=FALSE;

	// TODO: Delete these three lines if you don't want the toolbar to
	//  be dockable
	m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
	EnableDocking(CBRS_ALIGN_ANY);
	DockControlBar(&m_wndToolBar);

	return 0;
}

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
	if( !CFrameWnd::PreCreateWindow(cs) )
		return FALSE;
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CMainFrame diagnostics

#ifdef _DEBUG
void CMainFrame::AssertValid() const
{
	CFrameWnd::AssertValid();
}

void CMainFrame::Dump(CDumpContext& dc) const
{
	CFrameWnd::Dump(dc);
}

#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMainFrame message handlers

void CMainFrame::OnSla() 
{
	// TODO: Add your command handler code here
	CMenu *pStartMenu=this->GetMenu();//得到当前程序的主菜单
	UINT MenuNumber=pStartMenu->GetMenuItemCount();
	CMenu *pMenu;//定义要加载的菜单对象
	pMenu=(CMenu *)AMenu();	//得到DLL中的菜单项
	pStartMenu->AppendMenu(MF_POPUP,(UINT)pMenu->m_hMenu,"来自DLL的菜单");//在主菜单上添加新菜单项	
	this->SetMenu(pStartMenu);//显示添加新菜单项后的主菜单		
}

BOOL CMainFrame::OnCommand(WPARAM wParam, LPARAM lParam) 
{
	// TODO: Add your specialized code here and/or call the base class
	WORD x=LOWORD(wParam);
	if((x>=52771)&&(x<=62771)) MenuItem((UINT)x);
	//在此处对用户点击的菜单项进行判断，进行相应的处理。
	return CFrameWnd::OnCommand(wParam, lParam);
}