C#

DataContractSerializer xs = new DataContractSerializer(typeof(List<Customer>));
        DataContractSerializer xs2 = new DataContractSerializer(typeof(List<Book>));

Book-class:

    [KnownType(typeof(FaktaBok))]
    [KnownType(typeof(BarnBok))]
    [KnownType(typeof(SportBok))]
    [DataContractAttribute()]
    public class Book
    {
        [DataMember]
        protected int isbn = 0;

        [DataMember]
        protected string titel = null;

        [DataMember]
        protected string author;

        [DataMember]
        protected int price;

        [DataMember]
        protected String isType = null;

        [DataMember]
        protected Kund biblioteksKund = null;

One derived class:

[DataContractAttribute()]
     public class SportBok : Bok
     {
         [DataMember]
         private string sport;


Serialize: 

 using (Stream s = File.Create(path))
                {
                    xs.WriteObject(s, CustomerList);
                }

                using (Stream s2 = File.Create(path2))
                {
                    xs2.WriteObject(s2, BookList);
                }


DeSerialize:

 if (File.Exists(path))
 {
      using (Stream s = File.OpenRead(path))
       {
             CustomerList = (List<Kund>)xs.ReadObject(s);
       }
 }

if (File.Exists(path2))
{
      using (Stream s2 = File.OpenRead(path2))
      {
          BookList = (List<Bok>)xs2.ReadObject(s2);
      }
}

HtmlDocument doc = (HtmlDocument)Enquiry_Sourcing_Netcomponents.Document;

            doc.GetElementById("Session_Username").SetAttribute("value", "XXXXX");
            doc.GetElementById("Session_Password").SetAttribute("value", "XXXXX");
            doc.GetElementById("").InvokeMember("click");

            HtmlElementCollection theElementCollection = doc.GetElementsByTagName("input");

            HtmlElementCollection elems = doc.GetElementsByTagName("input");

            foreach (HtmlElement elem in theElementCollection)
            {
                String nameStr = elem.GetAttribute("name");
                if (nameStr != null && nameStr.Length != 0)
                {
                    String contentStr = elem.GetAttribute("content");
                    System.Windows.MessageBox.Show("Document: " + Enquiry_Sourcing_Netcomponents.ToString() + "\nDescription: " + contentStr);
                }
            }

Quote:

hi guys
i have this code which call an application into my picturebox
it works fine in vb 6 but when i converted to c# i got thi error

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

and when i trace the code its still in my form handle >>why it didn't go through all window handles??
i tthink my error is in the return of EnumChildProc function ,,,the return value or it calling in EnumChildwindow

 <blockquote class="FQ"><div class="FQA">Quote:</div>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;
using System.Runtime.InteropServices;
namespace call_another_exe
{
    public partial class Form1 : Form
    {
        [return: MarshalAs(UnmanagedType.Bool)]
        [DllImport("user32.dll", SetLastError = true)]
        static extern bool PostMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);
        // For Windows 
        [DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
        //class name
        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);
        //get desktop win
         [DllImport("user32.dll", SetLastError = false)]
        static extern IntPtr GetDesktopWindow();
        /////enum children
         [DllImport("user32.dll")]
         [return: MarshalAs(UnmanagedType.Bool)]
         static extern bool EnumChildWindows(IntPtr hwndParent, IntPtr lpEnumFunc, int lParam);
        //get window caption
         [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
         static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);
        /////get parent of the handle
         [DllImport("user32.dll", ExactSpelling = true, CharSet = CharSet.Auto)]
         public static extern IntPtr GetParent(IntPtr hWnd);
         ////The SetParent function changes the parent window of the specified child window.
         [DllImport("user32.dll", SetLastError = true)]
         static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
        /////show the window hndle
        [DllImport("user32.dll", SetLastError=true)]
         private static extern bool ShowWindow(IntPtr hwnd, int nCmdShow);
        ///////
        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern int GetWindowTextLength(IntPtr hWnd);
        /////// constants
        private const string gcClassnameNotePad = "WindowsForms10.Window.8.app.0.33c0d9d";
        public static int CC; //global 
        public int CurrentCount;
        private const int SW_NORMAL = 1;
        private const int SW_MAXMIZE = 3;
        private const int SW_MINIMIZE = 6;
        private const uint WM_DESTROY = 0x0002;
        private const int WM_CLOSE = 0x0010;//&h10

        ////////
        public IntPtr EnumChildProc(IntPtr hwnd)
        {
            StringBuilder sSave;
            StringBuilder lpClassName ;
            long RetVal;
    //Get the windowtext length
   /////  كيف  sSave = Space$(GetWindowTextLength(hwnd) + 1)
            sSave = new StringBuilder("",GetWindowTextLength(hwnd) + 1);
    //get the window text
    GetWindowText(hwnd, sSave,sSave.Capacity);
    //remove the last Chr$(0)
                //sSave = Left$(sSave, Len(sSave) - 1)

            

    if (sSave.ToString().Contains("ProgDVB"))
    {

        lpClassName = new StringBuilder(256);
        //retrieve the class name
        RetVal = GetClassName(hwnd, lpClassName, 256);
       
        if (lpClassName.ToString(0,Convert.ToInt16(RetVal)).Equals("WindowsForms10.Window.8.app.0.33c0d9d"))
        {
            CurrentCount = CurrentCount + 1;

            SetParent(hwnd, this.pictureBox1.Handle);
            if (hwnd != this.pictureBox1.Handle)
            {
                ShowWindow(hwnd, SW_MAXMIZE);
            }
        }
    }
   
    IntPtr y;
    y = new IntPtr(1);
return y;
          }

        public IntPtr EnumChildCount(IntPtr hwnd, IntPtr lparam)
        {
            
    StringBuilder  sSave;
    StringBuilder lpClassName ;
            long RetVal;
    //Get the windowtext length
    sSave = new StringBuilder(GetWindowTextLength(hwnd) + 1);
    //get the window text
    GetWindowText( hwnd, sSave, sSave.Length);
    //remove the last Chr$(0)
      sSave.ToString(0,sSave.Length );
    if (sSave.ToString().Contains("ProgDVB"))
    {
       lpClassName = new StringBuilder(256);
    //retrieve the class name
        RetVal = GetClassName(hwnd, lpClassName, 256);
    //MsgBox RetVal  //Show the classname
       if (lpClassName.Remove(lpClassName.Length, Convert.ToInt16(RetVal)).Equals("WindowsForms10.Window.8.app.0.33c0d9d"))
        {
          
 if (lpClassName.ToString(0,Convert.ToInt16(RetVal)).Equals("WindowsForms10.Window.8.app.0.33c0d9d"))
 {
     CC = CC + 1;
 }
       }
   }     
   
    //continue enumeration
    IntPtr y;
    y = new IntPtr(1);
    return y;
      }

        public IntPtr EnumChildCloseup(IntPtr hwnd, IntPtr lparam)
        {

            StringBuilder sSave;
            StringBuilder lpClassName;
            long RetVal;
            sSave = new StringBuilder(GetWindowTextLength(hwnd) + 1);
            //get the window text
            GetWindowText(hwnd, sSave, sSave.Length);
            sSave.ToString(0,sSave.Length);

            if (sSave.ToString().Contains("ProgDVB"))
            {
                lpClassName = new StringBuilder(256);
                //retrieve the class name
                RetVal = GetClassName(hwnd, lpClassName, 256);
                //MsgBox RetVal
                //Show the classname
                if (lpClassName.Remove(lpClassName.Length, Convert.ToInt16(RetVal)).Equals("WindowsForms10.Window.8.app.0.33c0d9d"))
                {

                    PostMessage(hwnd, WM_DESTROY, 0, 0);
                }
            }
            IntPtr y;
            y = new IntPtr(1);
            return y;

        }
      
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show(GetDesktopWindow().ToString());
            EnumChildWindows(GetDesktopWindow(), EnumChildProc(Handle), 0);
        }


        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
           EnumChildWindows(GetDesktopWindow(), EnumChildCloseup(Handle, IntPtr.Zero), 0);
        }
        
      
    }
}
</blockquote>