Re: passing a string to a dll

From:

"SteveR" <srussell@removethisinnernet.net>

Newsgroups:

microsoft.public.vc.mfc

Date:

Tue, 18 Sep 2007 17:55:07 -0400

Message-ID:

<ex5iO5j#HHA.4784@TK2MSFTNGP05.phx.gbl>

Yes, in my view, where I call the DLL function, I have:

#include "Debug\TestDLL\DLLRect.h"
---------------------
"Tom Serface" <tom.nospam@camaswood.com> wrote in message
news:ujvemyj%23HHA.4880@TK2MSFTNGP03.phx.gbl...

Just a guess, but did you include the header file for the DLL.

---------------------

"SteveR" <srussell@removethisinnernet.net> wrote in message
news:Ohn3ONj%23HHA.4460@TK2MSFTNGP02.phx.gbl...

Thank you all for your help.

I have now specified unicode in the dll, so it should match up with the
application.
I have, for now at least, chosen to use CString& in both the dll and the
application.

Please remember that I am not nearly as trained in depth as you all are,
and therefore cannot make complete sense of what I am now presented with:

Room 101View.obj : error LNK2001: unresolved external symbol
"__declspec(dllimport) public: bool __thiscall DLLRect::PullWhisker(class
CString &)" (__imp_?PullWhisker@DLLRect@@QAE_NAAVCString@@@Z)

My dll:

// DLLRect.h: interface for the DLLRect class.
//
//////////////////////////////////////////////////////////////////////

#if
!defined(AFX_DLLRECT_H__935F1132_14D8_4CC5_A466_5B6E1904C9B4__INCLUDED_)
#define AFX_DLLRECT_H__935F1132_14D8_4CC5_A466_5B6E1904C9B4__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class AFX_EXT_CLASS DLLRect
{
public:
DLLRect();
virtual ~DLLRect();
CString GetString();
CString LoadStringID(UINT stringID);
bool PullWhisker(CString& s); //LPCTSTR s);

};

#endif //
!defined(AFX_DLLRECT_H__935F1132_14D8_4CC5_A466_5B6E1904C9B4__INCLUDED_)
. . .
bool DLLRect::PullWhisker(CString& s)
{
if(s != _T("12345") )
::Beep(1000,200);
return true;
}

my app:

// DLLRect.h: interface for the DLLRect class.
//
//////////////////////////////////////////////////////////////////////

#if
!defined(AFX_DLLRECT_H__935F1132_14D8_4CC5_A466_5B6E1904C9B4__INCLUDED_)
#define AFX_DLLRECT_H__935F1132_14D8_4CC5_A466_5B6E1904C9B4__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class AFX_EXT_CLASS DLLRect
{
public:
DLLRect();
virtual ~DLLRect();
CString GetString();
CString LoadStringID(UINT stringID);
bool PullWhisker(CString& s); //LPCTSTR s);

};

#endif //
!defined(AFX_DLLRECT_H__935F1132_14D8_4CC5_A466_5B6E1904C9B4__INCLUDED_)
. . .
in my view:

DLLRect r;
CString s = _T("12345");
r.PullWhisker(s);