来看看，这两个这样是否是一样的效果？（得到框架指针）

[dingd]

出一道小题目： ：）

[dingd]

CMainFrame* pMF=(CMainFrame*)AfxGetApp()->GetMainWnd();
与
CMainFrame* pMF=(CMainFrame*)AfxGetApp()->m_pMainWnd;
一样吗？

大家来说说！

[用户 昵称]

i think is same

[jason_sun22]

我认为GetMainWnd()就是通过函数得到m_pMainWnd。

[nustchenhf]

CWinThread::GetMainWnd
virtual CWnd * GetMainWnd( );

Return Value

This function returns a pointer to one of two types of windows. If your thread is part of an OLE server and has an object that is in-place active inside an active container, this function returns the CWinApp::m_pActiveWnd data member of the CWinThread object.

If there is no object that is in-place active within a container or your application is not an OLE server, this function returns the m_pMainWnd data member of your thread object.

[hnyyy]

还可以
CMainFrame* pMF=(CMainFrame*)AfxGetMainWnd();

[andy_lau]

一样的
其实
GetMainWnd()
{
return m_pMainWnd;
}

[andy_lau]

一样的
其实
GetMainWnd()
{
return m_pMainWnd;
}

[FloatSea]

This function returns a pointer to one of two types of windows. If your thread is part of an OLE server and has an object that is in-place active inside an active container, this function returns the CWinApp::m_pActiveWnd data member of the CWinThread object.

If there is no object that is in-place active within a container or your application is not an OLE server, this function returns the m_pMainWnd data member of your thread object.
由此看来不同啊，只是在If there is no object that is in-place active within a container or your application is not an OLE server时是一样的！！

[GZCompiler]

看看，我觉得一般来说是一样的，不过正如楼上所说，有意外的时候。

[zhdleo]

不太一样。看MSDN后觉得。
因为：
使用GetMainWnd()，那么返回的值是：
This function returns a pointer to one of two types
of windows.
表示有2种情况。

情况一：
If your thread is part of an OLE server
and has an object that is in-place active inside an
active container, this function returns the
CWinApp::m_pActiveWnd data member of the CWinThread object.

我有一点不明白：
这个CWinApp::m_pActiveWnd怎么是data member of the CWinThread object？
CWinApp::m_pActiveWnd不是应该是data member of the CWinApp object。
虽然CWinThread也有CWinThread::m_pActiveWnd。
但“CWinApp::m_pActiveWnd data member of the CWinThread object”这句话
是不是有点不太合适呢？还是我理解有偏差？

情况二：
If there is no object that is in-place active within
a container or your application is not an OLE server,
this function returns the m_pMainWnd data member of your thread object.

可见2个还是有差别的。

[lungfun]

CWinThread::GetMainWnd
virtual CWnd * GetMainWnd( );

Return Value

This function returns a pointer to one of two types of windows. If your thread is part of an OLE server and has an object that is in-place active inside an active container, this function returns the CWinApp::m_pActiveWnd data member of the CWinThread object.

If there is no object that is in-place active within a container or your application is not an OLE server, this function returns the m_pMainWnd data member of your thread object

[dingd]

有些人还是仔细看过，和考虑过的。（不过还是有人草率的回答“一样”）

不过没人说的很透彻呀。
（还有人想混，照贴MSDN，我也有！）

我要的是透彻些的理解！

前面的几位高人，再给解释清楚些吧，谢谢

[dingd]

为什么没人说了呢？

[闻缺陷则喜何志丹]

我和大家的意见相同
一样

[ingot]

学习

[dingd]

哎，我还是半懂。

[CaptainIII]

查mfc的源代码吧