菜单项不能用

[sakural1175]

大家好：
最近要接到一个任务，在其它进程中添加插入一个菜单，通过注入dll到目的进程，dll注入成功了，并且菜单也成功插入进去了，但是问题出现了：菜单下面的所有子菜单都是灰色的，去网上查了一下原因，问题出在MainFrame类中的 m_bAutoMenuEnable成员，MFC默认改字段是TRUE的，那意味着没有添加过消息响应函数的命令都会被自动灰掉（我的消息响应是在MyWndProc里响应的，代码在最后），我试着用下面的代码去修改这个字段：

CWnd* pMainWnd=CWnd::FromHandle(g_hWnd);
pFrameWnd=(CFrameWnd*)(pMainWnd);
pFrameWnd->m_bAutoMenuEnable=FALSE;

不成功，debug了一下pFrameWnd指针不为空，但是里面的数据好像都是无用的数据，请问在dll中应该如何修改进程的字段，或者不用这种方法，使用其它的方法使得我的字菜单能响应消息，附上dll的全部代码：

DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
	// Remove this if you use lpReserved
	UNREFERENCED_PARAMETER(lpReserved);

	if (dwReason == DLL_PROCESS_ATTACH)
	{
		TRACE0("IMenuMfc.DLL Initializing!\n");
		
		// Extension DLL one-time initialization
		if (!AfxInitExtensionModule(IMenuMfcDLL, hInstance))
			return 0;

		// Insert this DLL into the resource chain
		// NOTE: If this Extension DLL is being implicitly linked to by
		//  an MFC Regular DLL (such as an ActiveX Control)
		//  instead of an MFC application, then you will want to
		//  remove this line from DllMain and put it in a separate
		//  function exported from this Extension DLL.  The Regular DLL
		//  that uses this Extension DLL should then explicitly call that
		//  function to initialize this Extension DLL.  Otherwise,
		//  the CDynLinkLibrary object will not be attached to the
		//  Regular DLL's resource chain, and serious problems will
		//  result.

		new CDynLinkLibrary(IMenuMfcDLL);


		HMENU hMenu=NULL;
		HMENU hMyMenu=NULL;
		HMENU hSubMenu=NULL;
		DWORD dwPid=0;

		CFrameWnd* pFrameWnd=NULL;
		
                  //获取主窗口句柄
		dwPid=GetCurrentProcessId();
		g_hWnd=GetWndFromProcID(dwPid);
                  //获取主窗口菜单句柄
		hMenu=::GetMenu(g_hWnd);

		CWnd* pMainWnd=CWnd::FromHandle(g_hWnd);
		pFrameWnd=(CFrameWnd*)(pMainWnd);
		pFrameWnd->m_bAutoMenuEnable=FALSE;

                  //插入菜单
		hMenu=GetMenu(g_hWnd);
		hMyMenu=LoadMenu(hInstance,MAKEINTRESOURCE(IDR_MENU_OPTION));
		hSubMenu=GetSubMenu(hMyMenu,0);
		InsertMenu(hMenu,2,MF_STRING|MF_BYPOSITION|MF_POPUP|MF_ENABLED,(UINT)hSubMenu,L"Option");
		hSubMenu=GetSubMenu(hMyMenu,1);
		EnableMenuItem(hMyMenu,(UINT)hSubMenu,MF_BYCOMMAND|MF_ENABLED);
		//DrawMenuBar(g_hWnd);

		g_oldProc=(WNDPROC)SetWindowLong(g_hWnd,GWL_WNDPROC,(LONG)MyWndProc);
		

	}
	else if (dwReason == DLL_PROCESS_DETACH)
	{
		TRACE0("IMenuMfc.DLL Terminating!\n");

		// Terminate the library before destructors are called
		AfxTermExtensionModule(IMenuMfcDLL);

		SetWindowLong(g_hWnd,GWL_WNDPROC,(LONG)g_oldProc);
	}
	return 1;   // ok
}

LRESULT CALLBACK MyWndProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
	if(uMsg==WM_SYSCOMMAND)
	{
		if(wParam==ID_OPTION_CONFIG)
			::MessageBox(hWnd,L"Config message catched",L"Tips",MB_OK);
	}
	return CallWindowProc(g_oldProc,hWnd,uMsg,wParam,lParam);
}

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