C# integration with COM component in Delphi

Hello,

I trying to write a software in C# that make calls in a .dll wrote in Delphi.

Im trying to call this method (wrote in delphi):

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Function Recebe_Cartao (var Matriz : array [ 1..721 ] of char) : boolean

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In my C# code, I declare like this:

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[DllImport("[url removed, login to view]", CharSet = [url removed, login to view])]

public static extern bool Recebe_Cartao( char[][] data);

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The problem is when I call in C# this method in my console application:

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Recebe_Cartao(RetornoMatriz);

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I get an error: Cannot marshal 'parameter #1': There is no marshaling support for nested arrays.

I found a solution in: [url removed, login to view] but I still dont know how to fix my code.

You can download my project in: [url removed, login to view]

Main objective: I need loop through all values of RetornoMatriz array.

Thanks

Marcelo

I changed my project in www.csharp.com.br/leitora.zip

Now I declare:

[DllImport("lc3000.dll", CharSet = CharSet.Unicode)]
public static extern bool Recebe_Cartao( out char[] data);

I get this error:

he runtime has encountered a fatal error. The address of the error was at 0x6390a520, on thread 0x1c2c. The error code is 0xc0000005. This error may be a bug in the CLR or in the unsafe or non-verifiable portions of user code. Common sources of this bug include user marshaling errors for COM-interop or PInvoke, which may corrupt the stack.

Kỹ năng: Lập trình C#, Delphi, Kiến trúc phần mềm

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