Basic Dll functions ( Open failed )

[Nobody/Anonymous]

Hello,

First i want to say that I just speak a little bit english, so I’m sorry if sometime what i say is complicated or false.

It's the first time when i use the MediaInfo library (MediaInfo.dll) and i have some problems to know how to use it.

I use a different Frensh laguage for programming, it's the W-Language, this why i need a very good and detailed explanation of how to use the MediaInfo Library.

In this programmation Laguage that I use is like that:

1) To define a variable :
Variable_nam is int/String/...
Variable_nam is int/String/... = Value

2) To call a DLL :
CallDLL32("DLL_File”, “Function_name”, Parameter1, Parameter2, ParameterN)

So, this is how I do to open a media file with the MediaInfo (but everytime it faile) :

Hndl is int = 0
Hndl = CallDLL32("C:\MyProgram\MediaInfo.dll", "MediaInfo_New") // The returned value <> 0

LIB = "" // LIB is the name of an object.
LIB = "Handle : " + Hndl

sop is int = CallDLL32 ("C:\MyProgram\MediaInfo.dll", "MediaInfo_Open", Hndl, "C:\MyProgram\Example.mp3")

IF sop <> 0 THEN
    LIB  = LIB + RC + "Open Success : " + sop // RC is /n in the C-Language (Retourn to ligne)
ELSE
    LIB  = LIB + RC + "Open Failed : " + sop
END

The result is that the MediaInfo_Open is failed 
So i I ask you to help me please.
I think that the problem is on my program, but if u explane to me how does it work or to give me an example, with the C-Language i will correct my program.

Thank you very much ;)
AS31

(you can contact me at l_as31_l@yahoo.fr) if you like!)

[Jerome Martinez]

C/C++ example are provided in the DLL package.
I think that the problem is W-Language is not Unicode-aware.
MediaInfo_Open() request Unicode string, does WinDev supports Unicode?
If not, try old Ansi method : MediaInfoA_Open(), and continue with MediaInfoA_* methods, which use Ansi strings.
For example, in C :
MediaInfo_Open(Hndl, L"C:\MyProgram\Example.mp3");
MediaInfoA_Open(Hndl, "C:\MyProgram\Example.mp3");

wchar_t* Return=MediaInfo_Open(Hndl, 0);
char* ReturnA=MediaInfoA_Open(Hndl, 0);

Note the "L", which means Unicode string.

PS : au pire on parlera en francais si c'est plus simple ;-)