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Posted by Sisyphus on July 20, 2005, 9:54 pm
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> Hello,
>
> How can I call MFC functions from Perl? Which module / method I should
> select? Inline:C ? Inline:CPP ? XS ? or SWIG?
>
If no-one here knows, ask on the Inline mailing list. The question seems to
have been raised on that list only once - and then not answered. But that
was some time ago and there might now be someone there who knows the answer.
I personally would not even attempt it with Inline::C - but Inline::CPP
could be worth trying if you've got it installed and functioning correctly.
I found the following code in a book and tried to compile it:
--- start SimpleMFCApp.cpp ----
#include <afxwin.h>
//Window class definition
class COurWnd : public CFrameWnd
{
};
// Application class definition
class COurApp : public CWinApp
{
public:
virtual BOOL InitInstance();
private:
COurWnd* GetMainWindow() {return static_cast<COurWnd*>(m_pMainWnd);}
};
//Function to create an instance of the main window
BOOL COurApp::InitInstance(void)
{
//Construct an object of our C++ window class
m_pMainWnd = new COurWnd;
//Call Create() to create the underlying window
GetMainWindow()->Create(NULL, _T("Our Simple Window"));
//Call ShowWindow() to display the window
GetMainWindow()->ShowWindow(m_nCmdShow);
return TRUE;
}
//Application object definition at global scope
COurApp AnApplication;
--- end SimpleMFCApp.cpp ----
But when I try to compile it I always get linking errors - no matter what I
try to link to. Closest I got to getting it to compile was by linking to
libcmt.lib with:
cl /MT SimpleMFCApp.cpp
That produced:
-----------------------------------
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.00.9466 for 80x86
Copyright (C) Microsoft Corporation 1984-2001. All rights reserved.
SimpleMFCApp.cpp
Microsoft (R) Incremental Linker Version 7.00.9466
Copyright (C) Microsoft Corporation. All rights reserved.
/out:SimpleMFCApp.exe
SimpleMFCApp.obj
libcmt.lib(crt0.obj) : error LNK2019: unresolved external symbol _main
referenced in function _mainCRTStartup
SimpleMFCApp.exe : fatal error LNK1120: 1 unresolved externals
----------------------------------
Unfortunately the only advice I could find on google involved clicking on
options within the Visual Studio GUI - which just makes me wanna throw up. I
couldn't find any help in terms of command line options. Do you know how
that app could be compiled from the command line ?
Or am I supposed to build a dll rather than executable ? I did find that by
removing the last line of code from SimpleMFCApp.cpp I was able to build a
dll by running:
cl /LD SimpleMFCApp.cpp
Do you want to access (from perl) an MFC dll ? Is that what you are trying
to do ?
I spent half an hour or so trying to access my SimpleMFCApp.dll using
Inline::CPP, but could not get past the error:
F:\vsnet\Vc7\atlmfc\include\afxv_w32.h(18) : fatal error C1189: #error :
WINDOWS.H already included. MFC apps must not #include <windows.h>
I don't know why that's happening yet (not sure whether it's something I'm
doing, or whether it's something that Inline::C does - and I've run out of
time for tonight :-(
I don't know where one would ask (anything) about swig, but you might find
out something about the possibility of mixing MFC and XS from the perl-xs
mailing list. See http://lists.perl.org/index.cgi .
Cheers,
Rob
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