UpdateAllViews

[microdisk]

void UpdateAllViews( CView* pSender, LPARAM lHint = 0L, CObject* pHint = NULL );
的第二个参数是什么意思？可以传入哪些值，各代表什么？
我查MSDN都没找到。

[hncdsun]

在MFC中定义如下：
void CDocument::UpdateAllViews(CView* pSender, LPARAM lHint, CObject* pHint)
// walk through all views
{
ASSERT(pSender == NULL || !m_viewList.IsEmpty());
// must have views if sent by one of them

POSITION pos = GetFirstViewPosition();
while (pos != NULL)
{
CView* pView = GetNextView(pos);
ASSERT_VALID(pView);
if (pView != pSender)
pView->OnUpdate(pSender, lHint, pHint);
}
}
void CView::OnUpdate(CView* pSender, LPARAM /*lHint*/, CObject* /*pHint*/)
{
ASSERT(pSender != this);
UNUSED(pSender); // unused in release builds

// invalidate the entire pane, erase background too
Invalidate(TRUE);
}
///////////////////////////////////////////
在自己的VIEW中，规定只重画的区域：由pHint
void CMyView::OnUpdate(CView* pSender, LPARAM lHint, CObject* pHint)
{
// TODO: Add your specialized code here and/or call the base class
if(pHint!=NULL)
{

CRect rect=//pHint;//这里自己去转换

this->InvalidateRect(&rect);
return;
}
Invalidate(TRUE);
return;
}

[seesi]

You can encode information using lHint and/or you can define a CObject-derived class to store information about the modifications and pass an object of that class using pHint.
附加参数