C# Interface for Win32 DLL functions with pointers?

[Fred West]

I am building a C# interface to a 3rd party win32 dll. The win32 function
has the following definition:

extern "C" int __declspec(dlli mport) _stdcall w32func(unsigne d char id, char
*pname);

Now in my C# class how do I declare the function. So far from the
documentation, I have come up with the following:

[DllImport("thea pi.dll", EntryPoint="w32 func")]
private static extern unsafe int W32Func(byte board id,
[MarshalAs(Unman agedType.LPStr)] string name);

Any comments or suggestions are greatly appreciated,

Fred W.

[Nicholas Paldino [.NET/C# MVP]]

Re: C# Interface for Win32 DLL functions with pointers?

Fred,

That's the way I would do it. I am curious about is the first parameter
with the name of "board id". That space is going to give you a syntax
error.

Also, you don't need the unsafe modifier. There is nothing about that
declaration that is unsafe.

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- mvp@spam.guard. caspershouse.co m

"Fred West" <fredwemail-news@yahoo.com> wrote in message
news:eRkJvg2cFH A.2688@TK2MSFTN GP14.phx.gbl...[color=blue]
>I am building a C# interface to a 3rd party win32 dll. The win32 function
>has the following definition:
>
> extern "C" int __declspec(dlli mport) _stdcall w32func(unsigne d char id,
> char *pname);
>
> Now in my C# class how do I declare the function. So far from the
> documentation, I have come up with the following:
>
> [DllImport("thea pi.dll", EntryPoint="w32 func")]
> private static extern unsafe int W32Func(byte board id,
> [MarshalAs(Unman agedType.LPStr)] string name);
>
> Any comments or suggestions are greatly appreciated,
>
> Fred W.
>[/color]

[Fred West]

Re: C# Interface for Win32 DLL functions with pointers?

That was just a typo, it should just be "byte id". Thanks

- Fred


"Nicholas Paldino [.NET/C# MVP]" <mvp@spam.guard .caspershouse.c om> wrote in
message news:etPY7j2cFH A.3940@TK2MSFTN GP10.phx.gbl...[color=blue]
> Fred,
>
> That's the way I would do it. I am curious about is the first
> parameter with the name of "board id". That space is going to give you a
> syntax error.
>
> Also, you don't need the unsafe modifier. There is nothing about that
> declaration that is unsafe.
>
> Hope this helps.
>
>
> --
> - Nicholas Paldino [.NET/C# MVP]
> - mvp@spam.guard. caspershouse.co m
>
> "Fred West" <fredwemail-news@yahoo.com> wrote in message
> news:eRkJvg2cFH A.2688@TK2MSFTN GP14.phx.gbl...[color=green]
>>I am building a C# interface to a 3rd party win32 dll. The win32 function
>>has the following definition:
>>
>> extern "C" int __declspec(dlli mport) _stdcall w32func(unsigne d char id,
>> char *pname);
>>
>> Now in my C# class how do I declare the function. So far from the
>> documentation, I have come up with the following:
>>
>> [DllImport("thea pi.dll", EntryPoint="w32 func")]
>> private static extern unsafe int W32Func(byte board id,
>> [MarshalAs(Unman agedType.LPStr)] string name);
>>
>> Any comments or suggestions are greatly appreciated,
>>
>> Fred W.
>>[/color]
>
>[/color]