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PO"Attempted to read or write protected memory. This is often an indication that other memory is corrupt." Delphi7 DLL from C#
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  1. PO"Attempted to read or write protected memory. This is often an indication that other memory is corrupt." Delphi7 DLL from C#
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    copied!<p>I am facing a problem calling a Delphi 7 DLL file from C#. I am new to C# and don't know Delphi that much and I don't need to really knows that much. I just need to get this problem solved as soon as possible.</p> <p>I am trying to call the dll from C# but I get this error : "Attempted to read or write protected memory. This is often an indication that other memory is corrupt."</p> <p>And I have no clue why it is happening . As you will see in my Delphi code , I'm not trying to return any value . I just need to send some commands on the COM port. Please if anyone can help me out of here :(</p> <p><strong>Delphi DLL code:</strong></p> <pre><code>library Project2; uses SysUtils, ComPort, Classes; var com1:TComport ; {$R *.res} procedure moveforward; export; begin com1.WriteAnsiString('#20 P1528 CR'+sLineBreak); com1.WriteAnsiString('#7 P1465 CR'+sLineBreak); end; procedure movebackward; export; begin comport1.WriteAnsiString('#7 P1528 CR'+sLineBreak); comport1.WriteAnsiString('#20 P1465 CR'+sLineBreak); end; procedure stopmove;export; begin comport1.WriteAnsiString('#20 P1500 CR'+sLineBreak); comport1.WriteAnsiString('#7 P1500 CR'+sLineBreak); end; procedure catch; export; begin comport1.WriteAnsiString('#2 P2120 T2000 CR'+sLineBreak); //arm comport1.WriteAnsiString('#30 P2260 T500 CR'+sLineBreak); //gripper end; procedure initialize; export; begin comport1.WriteAnsiString('#2 P2184 T1000 CR'+sLineBreak); //arm comport1.WriteAnsiString('#30 P1980 T2000 CR'+sLineBreak); //gripper end; exports moveforward, movebackward, stopmove, catch, initialize; begin end. </code></pre> <p><strong>C# Code</strong></p> <pre><code>using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication3 { public partial class Form1 : Form { [System.Runtime.InteropServices.DllImport("Project2.dll")] public static extern void moveforward(); public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { moveforward(); } } } </code></pre> <p>Any help will be truly appreciated</p>
 

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