Query about threads

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my codes are following:

C++

DWORD WINAPI ThreadProc(LPVOID lpParemeter)
{
   CMainFrame *pFrame = (CMainFrame*)AfxGetApp()->m_pMainWnd;
   CView *myview = (CView*)pFrame->GetActiveFrame()->GetActiveView();
}
//where  ThreadProc is a thread function.

Why not get the pointer of the view?

I also found the GetParent() is invalid. In other words, in the thread function, I can't call the GetParent() to get the pointer of the dialog' parent window.

Thus, GetParent(),GetActiveFrame(),GetActiveView() are invalid in the thread function.

How to do?
Help me,Thank you!

Posted 30-Nov-10 0:41am

yinglai

Updated 30-Nov-10 1:00am

Sandeep Mewara

v2

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User 7429338 · Answer 1 · 2010-11-30T06:52:00

Solution 3

The easiest way to solve this would be to pass the pointer of the view directly as argument when creating the thread.

LPVOID lpParemeter would then contain the wanted pointer.

Posted 30-Nov-10 6:52am

User 7429338

Eugen Podsypalnikov · Answer 2 · 2010-11-30T01:29:00

// How to do?

Try to find the way
to notify the windows about your wished actions
by the posting (WM_USER + X) messages to them.

In other words,
the secondary threads should try
to say something (to do) to the windows created in other threads
(and not try to ask something them) :)

Do you know why are you needing a view ?
So you could just order an action based on this reason.

E.F. Nijboer · Answer 3 · 2010-11-30T01:32:00

Solution 2

It is correct to say that GetParent(),GetActiveFrame(),GetActiveView() are invalid in the thread function. You need to invoke this into the main thread.

http://blogs.msdn.com/b/csharpfaq/archive/2004/03/17/91685.aspx[^]

Good luck!

Posted 30-Nov-10 1:32am

E.F. Nijboer