How to Access C DLLs from C#??

[neeraj.krishna]

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

 

[Michael C]

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;
}

 

[neeraj.krishna]

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;
}

 

[Laura T]

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.

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;
}

 

[simida]

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

 

[simida]

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

http://www.pinvoke.net/