Re: passing this object

From:
"Jung, William" <aopiyy001@yahoo.com>
Newsgroups:
microsoft.public.vc.language
Date:
Thu, 27 Nov 2008 16:41:38 -0800
Message-ID:
<1ifui4t2uh9j52h1fsv53o5icos84o47f0@4ax.com>
On Thu, 27 Nov 2008 08:34:15 -0500, David Wilkinson
<no-reply@effisols.com> wrote:

Jung, William wrote:

OK, the errors goes away if I use forward class declaration or extern.

but when I added the line (sock.cpp)
            Vscreen->PushMessage(std::string((const
char*)m_bReceiveBuffer + j));

where Vscreen is like this
    CVirtualScreen *Vscreen; (sock.h)

http://www.oniva.com/upload/1356/e2.jpg


William:

Please cut and paste the relevant errors in your post. Many people will not open
links in newsgroup postings.

You need

#include "VirtualScreen.h"

in Sock.cpp. When one class only uses another via a pointer, always:

Forward declare the other class in the .h file
#include the header of the other class in the .cpp file


You mean I should do

Sock.h
=============================
// always format declare
// but do not include VirtualScreen.h
class CVirtualScreen;

class Sock : public CSocketComm
{
public:
    Sock( CVirtualScreen *screen );
    ~Sock();
}

Sock.cpp
=============================
// include CVirtualScreen object
#include "VirtualScreen.h"

void Sock::Create1(CVirtualScreen *screen, CString port)
{
        Vscreen = screen;
        StartServer();
}

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