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10.31.2007 at 05:28PM PDT, ID: 22931370
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8.8

AccessViolationException calling C from C#

Asked by josgood in C# Programming Language, .NET

Tags:

In the example below, When the C# program tries to call Test on the C program I get
     AccessViolationException
     Attempted to read or write protected memory.  This is often an indication that other memory is corrupt.
I don't have the problem if I don't use the MessageBox.

What is my problem and how do I fix it?

========================C# Program=======================
using System;
using System.Text;
using System.Runtime.InteropServices;

namespace Program {
   class Demo {
      [DllImport(@"C:\Projects\QuickC\debug\QuickC.exe")]
      public static extern int Test();
     
      public static void Main() {
         Test();
      }
   }
}

========================C Program=======================
#include <windows.h>
#include <string.h>

__declspec( dllexport )int Test();

void main () {
}

int Test() {
   MessageBox(0,"Hi There","Test Program",MB_OK);
   return 1;
}
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Keywords: AccessViolationException calling C fro…
Title
1 Calling a MessageBox?
2 Universal MessageBox
3 MCustom MessageBox
4 MessageBox in ASP.Net
5 Occasional msvcr80.dll faulting with…
6 <string.h> and <cstring>
 
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[+][-]10.31.2007 at 05:53PM PDT, ID: 20190251

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About this solution

Zones: C# Programming Language, .NET
Tags: accessviolationexception
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Solution Provided By: RedKelvin
Participating Experts: 1
Solution Grade: A
 
 
[+][-]10.31.2007 at 06:44PM PDT, ID: 20190407

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