Re: Worker thread in VC++ 6

OK. Then what I'd do is just post a message when you think something needs
to be displayed. For example, you can create a WM_APP message and post
that:

I typically create messages like:

#define WM_UPDATE_STATUSMESSAGE (WM_APP + 200)
#define WM_UPDATE_PROGRESS (WM_APP + 201)
#define WM_UPDATE_ALL (WM_APP + 202)

And when I create thread object I have a function like the following that I
set in the thread from the main window before any status could happen.

void CMyThread::GUIWindow(CWnd *pWnd)
{
        m_pStatusWnd = pWnd;
}

void CMyThread::UpdateStatus()
{
     if(m_pStatusWnd)
          m_pStatusWnd->PostMessage(WM_UPDATE_STATUSMESSAGE,NULL,NULL);
}

For example, you could start the thread in mainframe somewhere:

CMyThread thread;
thread.GUIWindow(this);

Then you have to have a handler function:

In mainfrm.h

 LRESULT OnUpdateStatus(WPARAM wParam, LPARAM lParam);

In mainfrm.cpp

 ON_MESSAGE(WM_UPDATE_STATUSMESSAGE, OnUpdateStatus)

LRESULT CMainframe::OnUpdateStatus(WPARAM wParam, LPARAM lParam)
{
    // Thread wants us to do something
     return 0L;
}

You could call a function like this every so often in your worker thread
when you want to update the UI. Then you could have the UI fish the current
data out of the thread or global data you're using.

Tom

"Kahlua" <kahlua@right.here> wrote in message
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