2 replies to this topic

[anis0408]

Hello, could you please me help about that ?

In fact, I just need to call a C function which is in a library. I tried this :
system('rundll32.exe library.dll,function 20 ');

I can call my function but I can't pass 20 as an argument to my C function.

I also checked php extensions but clearly that is not what I need

Many thanks in advance for your answers

[Alexander]

Your question does not relate to PHP at all,

anis0408 said:

but I can't pass 20 as an argument to my C function.

Could you explain better the problem?

[dbug]

The functions called from rundll32 must be explicitly implemented to be called from it. They must use stdcall convention and the following signature:

void CALLBACK Function(HWND hwnd, HINSTANCE hinst, LPSTR lpszCmdLine, int nCmdShow);

The important part is the "lpszCmdLine" argument. It receives the arguments passed to rundll32 (all you put after the dll and function name) as a text string that the dll must parse before using them. In your case I supose you have a function like this:

void CALLBACK Function(UINT value);

In this case you should write an intermediate function with the first signature that parses the lpszCmdLine argument and converts it to an integer and then calls the second function with the resulting value.

The RunDll32 utility is not designed to call arbitrary functions. You can read more about it here.