Plugin development with VC8

[djorge]

Have anyone already tried VC8 to develop a (FS) plugin (without managed code)?
I am having some problems with function exports?

I have added a def file with the required functions for totalcmd (FSInit,...),
but my output dll doesn't have any exported functions.

[Flint]

djorge
I've just tried to recompile my FS-plugin VirtualDisk in VS8 (the plugin is developed in VS6) - and all worked well, exported functions are visible, the plugin is working.

[djorge]

I have recompiled a fs plugin made in VC6 either and it worked fine, but when i try to start a new dll project with VC8, the exported functions are not exported.

[ghisler(Author)]

I don't have VC8, but if it's similiar to VC6, did you add the .def file to your source list in the project? Otherwise it will be ignored.

[majkinetor !]

I don't know what is going on at my place but I have similar problems with VC 7:

This is the source template I created but it doesn't work despite the fact that functions are exported:

Code: Select all

#include "stdafx.h"
#define DllExport   __declspec( dllexport )

const int _FieldsNum = 1;

BOOL APIENTRY DllMain( HANDLE hModule, DWORD  ul_reason_for_call,  LPVOID lpReserved	 )
{
 
	return TRUE;
}

DllExport int __stdcall ContentGetSupportedField(int FieldIndex,char* FieldName,char* Units,int maxlen)
{	
	if ( (FieldIndex < 0) || (FieldIndex >= _FieldsNum) )
		return ft_nomorefields;

    strncpy(FieldName, "test field", maxlen);
    return ft_string;
}

DllExport int __stdcall ContentGetValue(char* FileName,int FieldIndex,int UnitIndex,void* FieldValue,int maxlen,int flags)
{
	if ( (FieldIndex < 0) || (FieldIndex >= _FieldsNum) )
		return ft_nosuchfield;

    if ( (flags && CONTENT_DELAYIFSLOW) > 0 )
		return ft_delayed;

 
  strncpy((char*)FieldValue, "test value", maxlen);
  return ft_string;
}

All compiler options are default.
The FileInfo plugin lists this:

Code: Select all

 int __stdcall ContentGetSupportedField(int, char *, char *, int)
 int __stdcall ContentGetValue(char *, int, int , void *, int, int)

Does anybody know what is going on ?
The same code works in Delphi 2005 !.

[djorge]

2ghisler(Author)
Yes. I've added the def file as i usulally do with VC6 and i also have added the compiler option to use this file in the "Module Definition File".

But VC8 keeps complaining:

Linking...
TCStartMenu.def : error LNK2001: unresolved external symbol FsFindClose
TCStartMenu.def : error LNK2001: unresolved external symbol FsFindFirst
TCStartMenu.def : error LNK2001: unresolved external symbol FsFindNext
TCStartMenu.def : error LNK2001: unresolved external symbol FsInit
D:\Programming\tc\WFX\TC FS StartMenu\Release\TCStartMenu.lib : fatal error LNK1120: 4 unresolved externals

[majkinetor !]

Hej , are you working on windows start menu plugin ?
Nice idea if so....

[djorge]

Well, the idea is to build a fs to modify the TC start menu like Ultra TC Main Menu Editor does. Ultra TC Main Menu Editor is a great tool but i think it will be great if i could do the same via an FS plugin. The main problem is that menu entries can't be sorted. But then i could sort the menu with Ultra TC main editor.

But the main purpose is to study the FS TC interface and make my first official plugin because now i have some time available for my own projects. But the code can be easilly modified to the windows start menu although i think it wouldn't be so usefull.

[majkinetor !]

I don't know what is going on at my place but I have similar problems with VC 7:

Solved.
Bad : #define DllExport __declspec( dllexport )
Good: #define DllExport export "C" __declspec( dllexport )

[djorge]

I've just tried to recompile my FS-plugin VirtualDisk in VS8 (the plugin is developed in VS6) - and all worked well, exported functions are visible, the plugin is working.

What about dll dependency?
My dll has the folowing dependencies:
MFC80.dll
MSVCR80.dll
MSVCP80.dll
Did your project ported from VC6 become dependent of all VC8 dll?

[Flint]

djorge
Of course it becomes (my plugin needs MFC80.DLL and MSCVR80.DLL). It's because the project is compiled with newer CRT and MFC versions, which need newer DLL files.