深入浅出MFC“文档/视图”架构(5)――框架
2009-02-11 20:00:28 来源:WEB开发网CFrameWnd类中重要的函数有Create(用于创建窗口)、LoadFrame(用于从资源文件中创建窗口)、PreCreateWindow(用于注册窗口类)等。Create函数第一个参数为窗口注册类名,第二个参数为窗口标题,其余几个参数指定了窗口的风格、大小、父窗口、菜单名等,其源代码如下:
BOOL CFrameWnd::Create(LPCTSTR lpszClassName, LPCTSTR lpszWindowName, DWORD dwStyle, const RECT &rect, CWnd *pParentWnd, LPCTSTR lpszMenuName, DWORD dwExStyle, CCreateContext *pContext)
{
HMENU hMenu = NULL;
if (lpszMenuName != NULL)
{
// load in a menu that will get destroyed when window gets destroyed
HINSTANCE hInst = AfxFindResourceHandle(lpszMenuName, RT_MENU);
if ((hMenu = ::LoadMenu(hInst, lpszMenuName)) == NULL)
{
TRACE0("Warning: failed to load menu for CFrameWnd.n");
PostNcDestroy(); // perhaps delete the C++ object
return FALSE;
}
}
m_strTitle = lpszWindowName; // save title for later
if (!CreateEx(dwExStyle, lpszClassName, lpszWindowName, dwStyle, rect.left,
rect.top, rect.right - rect.left, rect.bottom - rect.top, pParentWnd
->GetSafeHwnd(), hMenu, (LPVOID)pContext))
{
TRACE0("Warning: failed to create CFrameWnd.n");
if (hMenu != NULL)
DestroyMenu(hMenu);
return FALSE;
}
return TRUE;
}
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