Hi,
Is there anyone who has tried accessing C Dlls from C#? I got to know
that its Platform invocation Service, but did'nt get enough
documentation.
Can you give me some links to it?
Especially when a Struct is defined in C, how do I use it in C#. For
example, if there is a structure in C DDL(say cdll.dll) called struct
ListFields{}. How do use it in C# code??
Regards,
Neeraj Krishna

<(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi,
> Is there anyone who has tried accessing C Dlls from C#? I got to know
> that its Platform invocation Service, but did'nt get enough
> documentation.
> Can you give me some links to it?
> Especially when a Struct is defined in C, how do I use it in C#. For
> example, if there is a structure in C DDL(say cdll.dll) called struct
> ListFields{}. How do use it in C# code??
> Regards,
> Neeraj Krishna

Here's a simple example

[DllImport("user32")]
private static extern int GetWindowRect(int hwnd, ref RECT lpRect);

private class RECT
{
public int Left;
public int Top;
public int Right;
public int Bottom;
}

>

Hi,
But my structure is defined in C.....That is
In C DLL i have:
typedef struct Rect {
int x,y;
} MYRECT

In C to use this we write:
MYRECT rect1;

But to use the same DLL in C# WHAT SHOULD I DO???
I don't want to write a class and redefine the elements in it

Please help me ???

>
> Here's a simple example
>
> [DllImport("user32")]
> private static extern int GetWindowRect(int hwnd, ref RECT lpRect);
>
> private class RECT
> {
> public int Left;
> public int Top;
> public int Right;
> public int Bottom;
> }
>
> >

C# cannot use types defined in a C DLL. You must redefine them in your C#
program.
Otherwise, you COULD create a COM/.NET wrapper in the C DLL for the C types
but it's a quite a lot of work.

<(E-Mail Removed)> ha scritto nel messaggio
news:(E-Mail Removed)...
> Hi,
> But my structure is defined in C.....That is
> In C DLL i have:
> typedef struct Rect {
> int x,y;
> } MYRECT
>
> In C to use this we write:
> MYRECT rect1;
>
> But to use the same DLL in C# WHAT SHOULD I DO???
> I don't want to write a class and redefine the elements in it
>
> Please help me ???
>
>>
>> Here's a simple example
>>
>> [DllImport("user32")]
>> private static extern int GetWindowRect(int hwnd, ref RECT lpRect);
>>
>> private class RECT
>> {
>> public int Left;
>> public int Top;
>> public int Right;
>> public int Bottom;
>> }
>>
>> >
>

I think U can find some useful information for P/Invoke.
Good lack!

(E-Mail Removed) wrote:
> Hi,
> Is there anyone who has tried accessing C Dlls from C#? I got to know
> that its Platform invocation Service, but did'nt get enough
> documentation.
> Can you give me some links to it?
> Especially when a Struct is defined in C, how do I use it in C#. For
> example, if there is a structure in C DDL(say cdll.dll) called struct
> ListFields{}. How do use it in C# code??
> Regards,
> Neeraj Krishna

I think U can find some useful information for P/Invoke.
Good lack!

http://www.pinvoke.net/

(E-Mail Removed) wrote:
> Hi,
> Is there anyone who has tried accessing C Dlls from C#? I got to know
> that its Platform invocation Service, but did'nt get enough
> documentation.
> Can you give me some links to it?
> Especially when a Struct is defined in C, how do I use it in C#. For
> example, if there is a structure in C DDL(say cdll.dll) called struct
> ListFields{}. How do use it in C# code??
> Regards,
> Neeraj Krishna