Using unmanaged dll in c#: how to marshal a struct

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From: Thomas183 (gogglwoggl_at_gmx-dot-de.no-spam.invalid)
Date: 03/18/04 

Date: 18 Mar 2004 16:51:14 -0600

Hi,

I have a unmanaged c++ dll, and want to call a function
"dlltest(mystruct a)"of it.
The Parameter mystruct is a struct which consists of a array of
strings:

struct mystruct
{
char * myArray[100];
}

I searched the net for on hole day, to find a way to marshal this.
I have tried the following in C#:

[ StructLayout (LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct x_struct
{
[MarshalAs(UnmanagedType.LPArray, SizeConst=2)]

public [] string d;
};

[DllImport ("MyFile.dll", callingConvention.StdCall)]]
public static extern string dlltest(x_struct X);

The dll is in the system32 dir and functions with other structs (only
int) worked fine.

But with this one i get a EntryPointNotFound exception.

Thanks for your help

Thomas
mailto: gogglwoggl@gmx.de

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